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CHEMISTRY 2009 NEW PATTERN

SECTION "A" - MCQs MULTIPLE CHOICE QUESTIONS

NOTE Attempt all questions from this section.

Q.1. Choose the correct answer for each from the given options.

i. The significant figures in the number 5.734 are

2

3

4

5

ii. The Molecular Mass of Na2CO3 is

100 a.m.u

102 a.m.u

104 a.m.u

106 a.m.u

iii. The molecules which 64gm SO2 contains are

1.02 x 10(23)

2.04 x 10(23)

3.06 x 10(23)

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6.02 x 10(23)

iv. The molecular formula of Vitamin "C" is C6H8O6. Its empirical formula is

C2H3O2

C3H4O3

CH2O

CHO2

v. At sea level and 0oC, the atmospheric pressure on each square inch of our body is

10.4 pounds

11.7 pounds

14.7 pounds

30 pounds

vi. The distance between the nuclei of two atoms forming a covalent bond is called

Bond energy

Atomic mass

Bond length

Ionic radius

vii. A double arrow in a chemical reaction indicates

Reversible reaction

incomplete reaction

irreversible reaction

Complete reaction

viii. Faraday's experiment indicates, the existence of

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Electron

Proton

X-rays

Positron

ix. Which gas diffuses at the slowtest rate

NH3

CO

N2

SO2

x. CO2 has zero dipole moment because of its structure which is

Linear

Tetrahedron

Angular

Traingular

xi. Temperature volume relationship is called

Boyle's Law

Charle's Law

Avagadro's Law

Graham's Law

xii. Which of the following compounds have/has Sp3 hydridization.

C2H2

CH4

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CO2

C2H2

xiii. The energy of activation of chemical reaction is 75.0 KJ mole-1 what will be its value in pressure of a positive catalyst?

53.3 KJ mole-1

76.9 KJ mole-1

87.6 KJ mole-1

109.1 KJ mole-1

xiv. The rate of diffusion of C3H8 and CO2 are the same because

They are gas

both contain carbon

their molecular mass are same

C3H8 is an organic compound

xv. The value of Kc is independent of

Initial concentration of reactants

Volume

Catalyst

Pressure

xvi. The reaction between an acid and an alcohol is called

Neutralization

Hydration

Hydrolysis

Dehydration

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xvii. The solution which resists the changes in pH is called

Saturated Solution

Acidic Solution

Molar Solution

Buffer Solution

SECTION "B" - SHORT ANSWER QUESTIONS

(40 MARKS)

Q.2. Answer any TEN questions from this section. All questions carry equal marks. The answer to each question should not exceed 6-8 lines.

1. Define the following terms

Atomic Mass

Molecular Formula

Significant Figures

Avagadro's Number

Limiting Reactant

Order of Reaction

Intensive Properly

Mole

2. Give the main posulates of the Kinetic Molecular Theory of Gases.

OR

State the following Gas Laws

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Boyle's Law

Charle's Law

Graham's Law

Dalton's Law of Partial Pressure

Avagadro's Law

3. Write two points of difference between each of the following

Crystalline Solids & Amorphous Solids

Isomorphisim & Polymorphism

Emprical formula & Molecular Formula

4. Calculate the value of the gas constant R when "p" is expressed in atmospheres and "V" in dm3 and when MKS system is used.

OR

Derive the equation for the radius of the nth orbit of hydrogen atom using Bohr's Postulates.

5. Draw the shapes of s-orbital and p-orbital. Write down the names of the spectral lines of hydrogen atom.

OR

Write down the values of all the four quantum number for each of the two electrons of helium atom.

6. Diethyl Zinc is a chemical used in laboratory to protect the books from the worms. Its composition is 53% Zinc, 38.9% Carbon and 8.1% Hydrogen, find the emperical formula of the compound.

OR

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Find the mass, number of moles and volume of Carbon Dioxide gas at S.T.P obtained on burning of 6.0g of carbon. Give also equation. Also find the number of molecules of CO2.

OR

You are provided with 6.0gm of C and 100 gm of O2. Calculate the amount of CO2 prepared by reacting them. Which of them is a limting reactant.

OR

Ethylene glycol is used in automobiles as antifreeze. It has 38.7% Carbon 9.7% Hydrogen and 51.6% Oxygen. Its molecular mass is 62.0 mol-1. Determine its molecular formula

7. Define Radioactivity. Describe the experiment to distinguish the three types of radioactive radiation.

OR

Write down five properties of each Alpha (α), Beta (β), Gamma (γ) rays.

OR

What are Cathode Rays? How are they produced? Discuss the five properties of Cathode Rays.

8. What do you understand by the ionic character of a covalent bond.

OR

Describe the ionic character of a covalent bond with one example.

OR

Define coordinate covalent bond and explain the formation of (NH+4).

9. Give a brief account of the following

Viscosity

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Surface Tension

Vapour Pressure

Electron Affinity

Electronegativity

Buffer Solution

Common Ion Effect

Hydrolysis

Hydration

Neutralization

10. Write down the postulates of Arrhenius Theory of Ionization.

OR

Define the terms Oxidation and Reduction. Which of the substances is a reducing agent in the reaction Zn + H2SO4 ------> ZnSO4 + H2.

11. State the First Law of Thermodynamics. Derive the equation.

ΔH = ΔE + PΔV

Qp = ΔH

ΔE = Qv

OR

State and explain Hass's Law of constant heat summation.

12. In a certain process 848J of heat is absorbed by s system, while 394J of work is done on the system. What is the change in internal energy of the process.

OR

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Write down the electronic configuration for the ground state in Na (Z = 11) and Mg+2 (Z = 12).

OR

Give the number of protons, neutrons and electrons in 19/39K and 9/19F.

13. Arrange the following energy levels in ascending order using (n + 1) rule 4d, 3p, 7s, 4f, 2s.

OR

Calculate the wave number of radiation emitted in Lyman series of hydrogen atom when electron jumps from 2nd to Ist orbit.

14. For the reaction 2Hl(g) <-------> H2(g) + 12(g), one mole of Hl is introduced into a vessel at constant temperature, calculate the number of moles of I2 when the equilibrium reached (Kc = 0.0156).

OR

Will PbCrO4 precipitate from a solution prepared by mixing 200 cm3 of 2.5 x 10-4 M Pb(NO3)2 and 600 cm3 of 1.5 x 10-8 M K2Cro4? (Ksp of PbCrO4 = 1.8 x 10-14 mol-2 dm-6)

15. Give scientific reasons for the following

A falling drop of a liquid is always spherical.

Evaporation is a cooling process.

Honey is more viscous than water.

The bond angle is H2O is smaller than NH3.

CO2 is a non polar molecule.

Zinc dust when reacted with HCl produces hydrogen at a faster rate than a big piece of Zinc.

Ionization potential of Oxygen is smaller than that of Nitrogen.

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SECTION "C" - DETAILED ANSWER QUESTIONS

(28 MARKS)

NOTE Attempt any TWO questions from this Section. All questions carry equal marks:

Q.3 (A). Differentiate between the following

Sigma bond and Pi bond

sp3 - Hybridization and sp2 - Hydridization

Atomic orbital and Molecular orbital

Polar covalent bond and Non-polar covalent bond

Valence bond Theory and Molecular ortibal Theory

Intensive Properties and Extensive Properties

Exothermic Reactions and Endothermic Reaction

Q.3 (B). Write down the points of Electron Pair Replusion Theory and Hybird Orbital Model. Describe the shapes and structures CH4, BeCl2, H2O, and NH3 on the basis of Electron Pair Replusion Theory.

OR

What is Dipole Moment? Explain the shapes of CO2 and H2O molecules with the help of dipole moment.

Q.3 (C). Describe the following rules of electronic configuration.

Paulis Exclusion Principle

Aufbau Principle

(n + i) Rule

Hand's Rule of Maximum Multiplicity

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OR

Differentiate between the following

Principal Quantum Number and Azimathal Quantum Number

Line Spectrum and Continuous Spectrum

Orbit and Orbital

Natural Radioactivity and Artificial Radioactivity.

Q.4 (A). State the Law of Mass Action. Derive the equilibrium constant Kc for the reaction nA + nB <--------> xC + yD.

OR

State Rutheford's Nuclear Model of an atom on the basis of Rutherford's Experiment.

OR

What are the defects of Rutherford's Atomic Model? How Neil Bohr corrected them. Describe the postulates of Bohr's Atomic Theory.

OR

State and explain Le-Chatelier's Principle.

Q.4 (B). What are ionization Potential and Electron Affinity. Discuss the formation of bond between Sodium and Chlorine.

OR

Define Solubility Product and give its example and application.

OR

What is Electrode Potential? How is electrode potential and Zinc and Copper discovered.

OR

Define rate of reaction describe methods to determine the rate of reaction and also describe the factors which affect the rate of reaction.

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Q.4 (C). Calculate the rate constant for the reaction A + B --------> AB when the initial concentration of each of the reactant is 0.01 mol-1 dm-3 S-1.

OR

The volume of a given mass of a gas at 127°C is 2.0 dm3. What will be its volume at 254°C when pressure remains constant.

Q.5 (A). Differentiate between the following

Activation Energy and Threshold Energy

Positive Catalyst & Negative Catalyst

Rate of Reaction & Rate Constant

OR

Define the following terms

Enlthalpy

System

Heat of Formation

Thermodynamics

Surroundings

State

Thershold Energy

Activation Energy

Inhibitor

Indicator

Q.5 (B) i. Find the Oxidation number of Sulphur in H2SO4, SO2, H2S, SO3(-2)

Q.5 (B) ii. Balance the following equation by Ion Electron method.

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Fe(+3) + MnO4(-1) ----------> Fe+3 + Mn(+2) + H2O

Q.3 (C). Name the crystal system which has the following axis and angle.

a = b = c; α = β = γ = 90°

a = b ≠ c; α = β = γ = 90°

a ≠ b ≠ c; α = β = γ = 90°

a = b ≠ c; α = β = γ = 90°

ENGLISH 2009 NEW PATTERN

SECTION "A" - MCQs, MULTIPLE CHOICE QUESTIONS

(20 MARKS)

NOTE

Attempt all questions from this section.

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Q.1. Choose the Correct answer for each from the given options.

i. Professor Henry Corrie is a _____________.

Lawyer

Judge

Doctor

ii. Progress is a play that shows progress in _____________.

Humanities

Science

Emotions

Actions

iii. The real name of the count of Monto Cristo is _____________.

Fernand Mondigo

Morrel

Buchamp

Edmond Dantes

iv. Mrs. Meldon hates war because of _____________.

her father's death

her husband's death

her son's death

her daughter's death

v. Albert believed in _____________.

justice

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revenge

fighting duels

forgiveness

vi. Professor Corrie invented a _____________.

jet fighter

tank

submarine

bomb

vii. My Bank Account is a story of _____________.

Love

Adventure

Heroism

Humour

viii. U.N day is celevrated every year on _____________.

23rd October

24th October

25th October

26th October

ix. _____________ is the cluprit in the story "The Hostile Witness".

Charlton

Mr. King

Mr. Abbot

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Mr. Simon

x. Amalie was another name for _____________.

Fraulein Sehmidth

The Baroness

The Baron

The write

xi. The lesson "Pakistan Zindabad" throws light on the character of _____________.

Sir Syed Ahmed Khan

Allama Iqbal

Quaid-e-Azam

British Viceroy

xii. The famous scientist who has been presented as a model in the lesson "Science and Scientist" is _____________.

Rutherford

Albert Einstein

Newton

Watson

xiii. "As you like it" os written by _____________.

John Keats

William Shakespere

Sir Henry Wotton

Liegh Hunt

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xiv. Lines from Deserted village shows the concept of _____________.

beauty

love

human behaviour

nature

xv. "I will be sorry for their childness in Toys" is the voice of _____________.

the poet

the father

the mother

God

xvi. When Naploean saw the injured soldier in the "Incident of French Champ", the poet comperes his feelings with _____________.

an eagle

an eaglet

fire

snow

xvii. William Wordsworth believes that Lucy Gray has become the part of _____________.

Nature

Moor

Strom

Life

xviii. In the "Lay of the Last Minstrel", the poet preaches _____________.

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favouritism

Symbolism

Mannerism

Patriotism

xix. He _____________ the work before I got there.

finishes

had finished

will finish

finishing

xx. "Can you some evidences?", She said can be punctuated as:

Can you get some evidences, She said

"Can you get some evidences, She said"

"Can you get some evidences, She said?"

"Can you get some evidences?", She said.

SECTION "B" - SHORT ANSWER QUESTIONS

(50 MARKS)

NOTE Answer any TEN questions this section. All questions carry equal marks.

Q.2 (i). Why Albert behaves as an emotional young man in the play "The Count's Revenge".

OR

Do you think, "The Count's Revenge" is an emotional play? why?

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ii. Who, in you opinion, is the Villain of the play "The Count's Revenge"? Who bring his villainy into general public?

OR

Why did Albert decide not to fight a duel with the Count of Monte Cristo?

iii. How can you say that Mrs. Meldon is justified in killing her brothers?

OR

Prof. Henry Corrie represents the human tendencies of materialism. Justify the statement.

iv. What opinion does Prof. Henry Corrie hold about Women?

v. Why do you think that Birkenhead Drill is the story of Discipline?

OR

Why was there a roar of laughter when the author left the bank?

vi. Who was Eddie and how did he die?

OR

What idea does a casual visitor establish about the character Prof. Corrie?

vii. Why did the Count of Monte Cristo drop the idea of killing Albert in duel?

OR

How did Albert discover that the Count of Monte Cristo was the man who disgraced his factor?

xiii. Why does the writer apply the word "terrible" to the first year of Pakistan's history as an independent state?

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OR

Describe the personality of Quaid-e-Azam Muhammad Ali Jinnah as explained in the lesson "Pakistan Zindabad"?

ix. What was the real story related to the Castle of Cernogratz according to governess?

OR

What was the behaviour of the author in a bank according to the lesson "My Bank Account".

x. What do people think about Lucy Gray after her tragic death?

OR

Explain in your own words what religious lesson Coventry Patmore drew from the incident of "The Toys"?

xi. What does the writer mean for Scientific attitude of mind?

OR

In what way must new generation be educated?

xii. What were the clues that led to the detection that charlton was the real culprit in the story "The Hostile Witness?

xiii. What are the quelities of a really happy man as mentioned by Sir Henry Wotton in his poem. "The Character of Happy Life".

OR

Describe the intelligent answers given by the poor shepherd to King John in the poem. "The Abbot of Canterbury".

xiv. Fill in the blanks with appropriate prepositions, articles or verbs as the case may be.

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Henry gave _____________ taxi driver _____________ note. There was _____________ article about pollution in _____________ paper. The play was _____________ comedy. The bird is _____________ the cage. Rehana is going _____________ the stairs. Shabana is coming _____________ the stairs. Sharah is getting _____________ of the taxi. My friend _____________ the answer of this question (know). We _____________ to Ireland for our holidays last year (go). When I looked round the door, the baby quietly (sleep). My mother _____________ food, she _____________ now (cook).

xv. Match any two idioms in Column "A" and "B" and then use these idioms in your own sentences.

COLUMN "A" | COLUMN "B"

1. To get ............. a. a blue moon

2. To make ........ b. rid off

3. Once in .......... c. the ice

4. To break ........ d. both ends meet

5. To bury ............ e. the hatchet

SECTION "C" - DETAILED ANSWER QUESTIONS

(30 MARKS)

NOTE Answer any THREE questions from this section. All questions carry equal marks.

Q.3. Write a letter to the editor of a newspaper regarding teh frequent break down of electricity in you locality.

OR

Write a letter to the editor of a newspaper expressing how you feel about some of the major problems of the city.

OR

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Write a letter to the editor of a newspaper expressing your concern over the increasing incidents of mobile snatching in the city.

OR

Write a story based on moral on any ONE of the following.

1. Unity is Strength

2. Greed in Cruse

3. Tit for Tat

4. Pride hath a fall

5. A friend in need is a friend indeed

Q.4. Write a short essay on any ONE of the following topics.

1. Modern Inventions

2. Female Education

3. My Favourite Leisure-time

4. Merits and demerits of Internet

5. Duties of a Student

6. Advantages and Disadvantages of Science

7. A Visit to Historical Place

8. Environmental Pollution

Q.5. Highlights the outstanding features of any ONE of the following characters.

1. Professor Henry Corrie

2. Mrs. Meldon

3. Albert

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4. The Count of Monte Cristo

5. The Countness of Morcerf

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PHYSICS 2009 NEW PATTERN

SECTION "A" - MCQs MULTIPLE CHOICE QUESTIONS

(17 MARKS)

NOTE Attempt all questions from this section.

Q.1. Choose the correct answer for each from the given options.

i. Laws of Reflection of Refraction are given up

Al - Razi

Al - Beruni

Ibn-al-Haithum

Ibn-e-Sina

ii. k (i x j) has value

Zero

one

j

k

iii. The dimensions of angular momentum is

MLT¹

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ML²T-¹

ML²T¹

MLT²

iv. If (vector A) . (vector B) = 0, (vector A) x (vector B) = 0, and (vector A) = 0 the vector B is

equal to vector A

null vector

perpendicular to vector A

parallel to vector A

v. In an ellastic collision.

Kinetic energy is coserved but momentum is not conserved

Momentum is conserved but kinetic energy is not conserved

Both momentum and kinetic energy are conserved

Neither kinetic energy nor momentum is conserved

vi. A car is travelling at 65 km hr-¹ north turns without change in speed. The car is moving with

uniform velocity

uniform acceleration

Average velocity

None of these

vii. A projectile is thrown up with the initial velocity of Vo making an angle of 30° with the horizontal direction. It will cover the same range of the angle is

15°

20°

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45°

60°

viii. A body of mass 10 kg starts falling freely. The height lost by it in the first second is

4.9 m

9.8 m

19.6 m

49 m

ix. The dot product of a unit vector i and k is

zero

1

-1

j

x. If a man goes to height equal to the radius of the earth from its surface, his weight relative to that of earth would become

half

same

twice

one-fourth

xi. The time period of simple pendulum depends upon it

length

amplitude

mass of bob

temperature

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xii. The physical quantity which is related to loudness of sound is

frequency

intensity

quality

wavelength

xiii. An object is executing simple harmonic motion. Its kinetic energy is maximum at

mean position

extreme position

at any point along the path

None of these

xiv. When two vibrating bodies have slightly different frequences, they produce

echo

beats

resonance

polarization

xv. The evidence of transverse nature of light is provided by

polarisation

diffraction

interference

dispersion

xvi. An optical fibre transmits bright light because

Inside of pipe is polished

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Multiple reflections are independent of law of refraction

Total internal reflection takes place

None of these

xvii. Ultraviolet spectrum cover a range of wavelength from

4000°A to 8000°A

0°A to 100°A

100°A to 4000°A

Above 8000°A

SECTION "B" - SHORT ANSWER QUESTION

Q.2. Answer any TEN questions from this section. All questions equal marks.

i. Describe Addition of two vectors by rectangular components.

OR

Explain dot product of two vectors.

OR

Explain Vector product of two vectors.

OR

Can the resultant of two vectors of the same magnitude be equal to the magnitude of either of the two vectors? How?

ii. Define Projectile motion. A projectile is thrown upward in air at angle "θ" with the horizontal with velocity Vo derive the expressions for the time taken to reach maximum height and horizontal range.

OR

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Is it possible for a body to have an acceleration when it is moving with constant velocity or constant speed?

iii. Define Simple Harmonic Motion. Prove that the motion of Simple Pendulum is Simple harmonic motion.

OR

Write down the expression for the acceleration representing simple harmonic motion. Would you keep the amplitude of a Simple Pendulum small or large? Why?

iv. What are Newton's Rings? Derive an expression for the wavelength of light used in Newton's Rings?

OR

How did Thomas Young achieve the condition of phase coherence for light in his double-slit experiment?

v. If (vector P) = 2i - 2j + 3k and (vector Q) = 3i + 3j + 3k; find the unit vector perpendicular to the plane containing (vector P) and (vector Q) both. If (vector P) and (vector Q) form the sides of a parallel; find the area of paralleleogram.

OR

An object moves along a straight line from (3, 2, -6) to (14, 13, 9) when a uniform force (vector F) = 4i + j + 3k acts on it; find the work done and the angle between force and displacement.

vi. A car starts from rest and moves with a constant acceleration. During the fifth second of its motion, it covers a distance of 36m; calculate the acceleration of the car and the total distance covered by the car during this time.

OR

A machine gun firs 20 bullets per second into a target. Each bullet weight 10gm and has a speed of 1500 m/s; find the force necessary to hold the gun in position.

vii. A machine gun is pointed upward at an angle of 30° with respect to horizontal and

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fires a projectile with a velocity of 200 m/s; calculate the range of projectile and the height of projectile.

OR

A player throws a ball at an initial velocity of 36 m/s; calculate the maximum distance reached by the ball, assuming the ball is caught at the same height which it was released. If he wishes to throw the ball half the maximum distance in the shortest possible time; compute the angle of elevation.

viii. The radius of moon is 27% of the earths radius and its mass is 1.2% of the earth's mass, calculate the acceleration due to gravity on the surface of the moon.

OR

At what depth from the surface of the earth would the acceleration due to gravity (g) be half on earth's surface?

ix. A 15m ladder, weighing 350N, rests against a smooth wall at a point 12m above the ground, the centre of gravity of the ladder is one third away up. A boy of 470N climbs half way up the ladder; calculate the reaction of the wall and the ground.

OR

A small sphere of 50gm is suspended by a light string as it oscillates, the sphere is 1.75m from the ground at its highest point and 0375m from the ground at its lowest point; find its maximum speed.

x. The frequency of a string is 125 hertz, when it is vibrating in 5 segments (nodes at both ends); calculate the frequency when the string vibrates in three and four segments.

OR

A body is hanging from a string vibrates is set into motion and the period of oscillation is 0.8 sec. After the body has come to rest, it is removed. How much shorter will the spring be when it comes to rest.

xi. An ambulance has a siren producing sound waves of frequency 200 Hz and moving towards a listener standing on a bus stop. If the frequency heard by the listener is 150 Hz; find the speed of the ambulance (speed of sound in air = 340 m/s).

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OR

Calculate the speed of sound in air at 0°C if the mean molar mass (M) for air is 0.0288 kg/mol, molar gas constant (R) is 8.341 J/mol-K and r = 1.40.

xii. A 2cm long string has mass 0.004 kg is streched horizontally by passing one end over a pulley and attaching a 1 kg mass to it; find the speed of the transverse waves on the string and the frequency of the fifth harmonic.

OR

Calculate the length of Second Pendulum on moon's surface where acceleration due to gravity is 1.63 m/s².

xiii. In a double slit experiment, the separation of the sits is 1.8 mm and the fringe spacing is 0.30 mm at a distance of 120 mm from the slits; find the wavelength of the light.

OR

271 finges pass a reference point when the moveable mirror of Michelson's Interferometer is moved by 0.08 mm. Find the wavelength of the light in angostrom.

xiv. Determine the wavelength of a monochromatic light used if 14th bright Newton's ring has radius of 1mm when a plano-convex lens of radius of curvature 126 mm is used.

OR

When a light of wavelength 6000° A falls on a diffraction gratin, it produces a second order spectrum at an angle of 30°C; find the gravity element and the number of lines per millimeter ruled on it.

xv. A compound microscopic has an objective and an eye piece of focal length 1 cm and 5 cm respectively. The object is located at a distance of 1.05 cm from the objective forms an image 4.17 cm close to the eye piece; find the separation of the lenses and the magnifying power of the microscopic (d = 25 cm).

OR

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A telescopic has the objective and the eye piece lenses of power 2.0 and 20.0 diopter respectively. What is the magnifying power and the length of the telescopic if it is focused for infinity.

SECTION "C" - DETAILED ANSWER QUESTION

(28 MARKS)

NOTE Answer any TWO questions from this section. All questions carry equal marks.

Q.3 (A). Two bodies of "A" and "B" of masses m1 and m2 are attached at the two ends of a string which passes over a frictionless pulley. If m1 > m2 derive the expressions for the acceleration of the system and for the tension in the string?

OR

Define Momentum and explain the Law of Conversation of Momentum. Two spheres of unequal masses "A" and "B" moving with initial velocities U1 and U2 in the same direction collide elastically. Derive the relations for their final velocities.

Q.3 (B). What is an inclined Plane? A block of mass "m" is placed on the surface of an inclined plane describe the movement of the block on inclined plane and derive the expression for the acceleration and discuss the special cases.

OR

Define Centripetal Force and Centripetal Acceleration and derive the expressions for the Centripetal Acceleration and Centripetal Force.

OR

What is meant by Equilibrium? Define its types. Explain the conditions of equilibrium with mathematical expressions.

Q.3 (C). State Newton's Law of Gravitation. Using this law, obtain a relation for the average Mass and average Density of the earth.

OR

Define Work, give its S.I.; Unit. Establish Work-Energy Equation for a freely falling body in a gravitational field.

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OR

Density of the earth.

OR

Define conservative field, prove that the gravitational field is a conservative field.

OR

Derive expressions for variation of "g" with altitude and depth.

Q.4 (A). Derive an expression for the instantaneous velocity of a body performing simple harmonic motion. Prove that the total energy of a simple harmonically moving body is constant.

OR

What are stationary waves? A string of length "l" is stretched between two ends; find the expressions for the frequency of stationary waves produced, when it is vibrating.

One loop

Two loops

Three loops

n loops

Q.4 (B). Explain the phenomenon of Beats. Obtain an expression for Beat Frequency for the wave describe by the following y1 = Ao cos 2 π f1t, y2 = Ao cos 2 π f2t, where symbols have their usual meanings.

OR

What are stationary waves? On what factors does the frequency of stationary waves in a stretched string depend? State there laws of transverse vibrations in a sonometer.

Q.4 (C). Explain Newton's Formula for the speed of sound? Derive the relevant formula, also give Laplace correction.

OR

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What is Doppler's Effect? Derive expressions for the apparent frequency of a sound when

An observer moves towards a stationary source.

The source moves towards a stationary observer.

Q.5 (A). Explain Young's double slit experiment and derive an expression for fringe spacing with the help of a diagram.

OR

Describe the construction and working of Michelson's Interferometer.

Q.5 (B). What is the difference between Fresnal and Frandhoffer diffraction? What is diffraction grating? Derive an expression for the determination of wavelength of a monochromatic light by diffraction grating. Derive Bragge's Law for x rays diffraction.

OR

What is meant by interference in thin films. Obtain expressions for constructive and destructive interference.

OR

State and explain Huygen's Principle of wave front.

Q.5 (C). Describe the construction and working of an Astronomical Telescope. Derive the formula for its magnification with the help of a ray diagram.

OR

What is magnifying glass. Define visual angle and derive an expansion for the magnifying power of a magnifying glass (Simple Microscope).

OR

Two thin lenses fi and f2 placed in contact.

OR

Derive the formula of the local length of the combination.

OR

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What are the defects in lenses? How are they removed?

1. Letter to the editor of a newspaper expressing your views on frequent power breakdown in the city.

Examination Hall, A.B.C Road, Karachi 9th February 2000

The Editor,

The Daily DAWN,

Karachi.

Dear Sir,

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I wish to draw the attention of the concerned authorities, through the columns of your esteemed newspaper, towards an extremely vital and tormenting problems of the city.

For the last several months, the people of Karachi, in spite of paying all types of taxes and utility bills, are encountering problems due to frequent power failures. Frequent breakdowns have become a headache for the residents particularly for students who have to prepare for their examinations. I regret to point out that it seems as if there is nobody to take care of the citizens and solve their problems. The authorities have not paid any attention or given a positive response to the repeated requests of the residents of Karachi. The situation has now reached at an alarming stage, which may result in the form of protests and caustic damages of the government buildings.

The concerned authorities are therefore requested to look into this matter without further delay and take suitable steps to solve the problem.

Thanking you for your cooperation.

Yours truly,

X. Y. Z

A Citizen of Karachi.

2. Letter to the Health Officer complaining of the unsanitary conditions in your locality.

Examination Hall, A.B.C Road, Karachi 9th February 2000

The Health Officer,

District East,

Karachi.

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Dear Sir,

I wish to draw your attention towards an extremely vital and tormenting problems of our locality.

For a long time, the people of our neighborhood, in spite of paying all types of taxes and utility bills, are encountering problems caused by the unsanitary conditions. Unclean and dirty lanes with overflowing drains are causing great trouble and tension among the residents. I regret to point out as if there is if there is nobody to take care of the citizens and solve their problems. We have been facing the torture of messy conditions and improper drainage system and the authorities pay no heed to our complaints.

The situation has now reached at an alarming stage, which may result in the form of protests and caustic damages of the government buildings. I hope you would look into this matter without further delay and take suitable steps to solve the problems.

Yours truly,

X. Y. Z

Resident of P. Q. R. Area,

Karachi.

3. Letter to the editor of a newspaper expressing your views on water shortage in your area.

Examination Hall, A.B.C Road, Karachi 9th February 2000

The Editor,

The Daily DAWN,

Karachi.

Dear Sir,

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I wish to draw the attention of the concerned authorities, through the columns of your esteemed newspaper, towards an extremely vital and tormenting problems of our neighbourhood.

For the last several months, the people of this residency, in spite of paying all types of taxes and utility bills, are encountering problems due to water shortage. Most of the time, pressure of the water is low and it takes quite a lot of time to fill a bucket. We are facing the torture of hot summer without proper water supply. I regret to point out that it seems as if there is nobody to take care of the citizens and solve their problems. The authorities have not paid any attention or given a positive response to the repeated requests of the residents. The situation has now reached at an alarming stage, which may result in the form of protests and caustic damages of the government buildings.

The concerned authorities are therefore requested to look into this matter without further delay and take suitable steps to solve the problem.

Thanking you for your cooperation.

Yours truly,

X. Y. Z

Resident of P. Q. R. Area,

Karachi

5. A letter to a leading newspaper, about the problem of beggary in your town.

Examination Hall, A.B.C Road, Karachi 9th February 2000

The Editor,

The Daily DAWN,

Karachi.

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Dear Sir,

Through the columns of your esteemed paper, I want to invite the attention of the district authorities to the problem of beggary in our town. Recently, the number of beggars in our town has increased manifold you. They pursue you like a shadow. Even hale and hearty people have taken to begging. Small boys and children have caught the infection. Perhaps they are made to beg by their guardians.

The beggars gather at places frequented by the people. The bus stands, market places, post offices, railway station and mosques are their favourite haunts. It is impossible to move about these places peacefully. If you sho generosity and open you purse, you are surrounded by a host of them.

Some child-lifters, in the guise of beggars, are on the look out for abducting children. Two or three cases of this kind have occurred recently, and the culprits have been caught red-handed.

The female beggars enter the houses quietly without calling out for alms at the door. If they are not noticed by the inmates, they run away with whatever they can lay hands on. They act as informers to the burglars who break into houses at night.

A prompt action on the part of Government is required to check this social evil.

Yours truly,

X. Y. Z

Physics XI Karachi Board MCQs Chapter 3From Guess PapersJump to: navigation, search

Chapter 3 - Motion

1. The change of position of a body in a particular direction is called its __________.

(Displacement, Velocity, Acceleration)

2. The change of displacement with respect to the time is called __________.

(Speed, Velocity, Acceleration)

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3. The rate of change of position in a particular direction is called __________.

Displacement, Velocity, Acceleration)

4. The total change in displacement divided by the total change in time of body is called its __________.

(Average Velocity, Instantaneuous Velocity, Uniform Velocity)

5. The change of displacement in a very small interval of time (time tends to zero) of a body is called its __________.

(Average Velocity, Instantaneous Velocity, Uniform Velocity)

6. When a body undergoes an acceleration then __________.

(Its speed increases, Its velocity increases, It falls toward the earth)

7. A force acts on a body that is free to move. We known that magnitude and direction of the force and the mass of the body. Newton’s second law of motion enables us to determine the body’s __________.

(Acceleration, Speed, Velocity)

8. A hole is drilled through the earth along the diameter and a stone dropped into it. When the stone is at the centre of the earth it has __________.

(Mass, Weight, Acceleration)

9. A force of 3N acts perpendicularly to a force of 4N. Their resultant has magnitude of __________.

(1N, 5N, 7N)

10. In __________ of the following examples the motion of the car not accelerated.

(Car turns a corner at constant speed of 29km/hr, Car climbs a steep hill with its speed dropping from 60 km/hr at the bottom to 15 km/hr at the top, Car climbs a steep hill at the constant speed of 40km/hr)

11. The algebraic sign of acceleration depends on __________.

(The choice of direction, Whether an object is speeding up or slowing down, The position of the object)

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12. The acceleration due to gravity __________.

(has the same value every where in space, has the same value every where on the earth, varies with the latitude on the earth)

13. Swimming is possible because of __________ law of motion.

(First, Second, Third)

14. A vehicle is moving horizontally at 30m/s. It is then accelerated uniformly in the same direction at 0.5 m/s2 for 30 seconds. Its final speed is __________.

(180 m/s, 45.0 m/s, 90 m/s)

15. An object falls freely from rest with an acceleration of 10m/s2 (approximately). Then the distance traveled after 0.6 second is __________.

(1.8 m, 18.0 m, 3.6 m)

16. A trolley of mass 1.0kg travelling at 3m/s, collides with second trolley which is stationary. On collision the two trolley join together and continue to travel in the original direction with a common speed of 1.0 m/s. __________is the mass of second trolley.

(0.33kg, 0.67kg, 2.0kg)

17. A steel ball is dropped in a viscous fluid. It will __________.

(move down with uniform velocity, remain stationary, fall with uniform acceleration of 9.8 m/s2)

18. A trolley of mass 2kg moves with constant acceleration on a smooth horizontal surface. Its speed changes from 4m/s to 16 m/s during 6.0 seconds. The trolley has an acceleration of __________m/s2.

(0.5 , 0.66, 2)

19. During a stop a car comes to rest from a speed of 10 m/s in 5 seconds. Assuming a steady deceleration during this time, it will travel a distance of __________.

(2m, 10m, 25m)

20. A ball is dropped from a tall building falls to the ground. Ball reaches the ground in 3.0 seconds. __________ is the height of the building.

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(15m, 30m, 45m)

21. A trolley of mass 2kg is moving at 15m/s. It collides head on with another trolley of mass 1kg initially at rest. The first trolley sticks with second one. __________ is the speed of both trolleys after collision.

(5m/s, 7.5m/s, 10m/s)

22. When a tennis ball is allowed to fall freely in air toward the ground. It is found that it acquires a uniform velocity. This is because the __________.

(Weight of the ball does not act beyond a certain speed, Upthrust of the displaced air supports the ball, Frictional force caused by the air increases with speed)

23. The force required to accelerate mass of 1kg at 1.0 m/s2 is __________.

(1N, 10N, 100N)

24. If a stone falls from rest with a uniform acceleration of 10m/s2 (approximately) then __________.

(It falls equal distance in successive seconds, it falls 10.0 m during the first second, its speed increases by 10 m/s each second)

25. The frictionless trolley is moving horizontally at 30m/s. It is then accelerated uniformly in the same direction at 0.5 m/s2 for 30.0 seconds. The final speed is __________.

(15 m/s, 45 m/s, 75 m/s)

26. A person covers half of its journey at a speed of 40 m/s and the other half at 50 m/s. His average speed during the whole journey is __________.

(45 m/s, 46 m/s, 48 m/s, 44.1 m/s)

27. An object is thrown vertically upward with a velocity of 40 m/s and returns after some time into the thrower’s hands with the same velocity. Average velocity during the whole movement is __________.

(40m/s, 60m/s, 80 m/s, 0)

28. A body starts from rest and moves with uniform acceleration of 10m/s2 in the first 10 seconds. During the next 10 seconds it moves with uniform velocity attained. The total distance covered by it is __________.

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(200m, 1000m, 1500m, 500)

29. A ball A dropped from the top of a building while another ball B is thrown horizontally at the same time. The ball strikes the ground is __________.

(Ball A, Ball B, Both strikes simultaneously)

30. __________ of the following is one dimensional motion.

(The wheels of a moving train, the earth revolving round the sun, A train running on a straight track)

31. A body has an initial velocity of 8 m/s. After moving 4m its velocity is 12 m/s. The acceleration is __________m/s2.

(10, 100, 4)

32. A body starting from rest travels 120 m in 8th second. Assuring the motion to be uniform, its acceleration is __________m/s2.

(15, 16, 10)

33. A body thrown vertically up with a velocity of 10m/s, comes back in to the hand of the thrower after 4 seconds. Height attained by the body is __________. (Take g = 10m/s2)

(10m, 5m, 15m)

34. The total change in velocity of a body divided by the total time is called __________.

(Average acceleration, Instaneous Acceleration, Uniform Accelration)

35. The change in velocity of a body in a very small interval of time (time interval tends to zero) is called __________.

(Average acceleration, Instantaneous Acceleration, Uniform Acceleration)

36. When there is equal change in velocity in equal intervals of time, then acceleration is called __________.

(Average Acceleration, Instantaneous Acceleration, Uniform Acceleration)

37. Force is that agent which produces or tends to produce the __________.

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(Speed in the body, Acceleration in the body, Constant velocity in the body)

38. Whenever a constant force is applied on a body then it will move with __________.

(Cosntant Speed, Constant Velocity, Constant Acceleration)

39. The direction of tension in string will always in the __________.

(Same direction of applied force, Opposite direction of applied force, None of the above)

40. A body of mass 10kg is suspended by a string, the tension produced in the string is __________. (Take g = 10m/s2)

(100N, 9.8 N, 980 N)

41. In elastic collision between the two bodies __________.

(Only mometum of the system is conserved, Only the kinetic Energy of the system is conserved, Both the kinetic Energy and Momentum of the system remain the same)

42. In inelastic collision between the two bodies __________.

(Only mometum of the system is conserved, Only the kinetic Energy of the system is conserved, Both the kinetic Energy and Momentum of the system remain the same)

43. If a lighter body collides elastically with a massive body at rest then the lighter bodies will __________.

(Rebound, Come to rest, Start to move with a velocity double of its initial)

44. The kinetic friction will always be __________.

(Greater than the static friction, Equal to the Static Friction, Less than the static Friction)

45. The unit of coefficient of friction in SI system is __________.

(Newton, Dyne, None of These (No Unit))

46. Due to the rise in temperature the coefficient of fluid friction will __________.

(Decrease, Increase, Remain the same)

47. A body of mass ‘m’ slides down a frictionless inclined plane making an angle q with the horizontal then __________ of the following statement is most appropriate.

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(The component of its weight normal to the plane pulls it down the plane, The component of its weight parallel to the plane is balanced by the normal reaction of the plane, The body moves down the plane with a constant acceleration)

48. If a weight of 1 kg and 1gm are dropped from the same height simultaneously then __________.

(1kg will reach the ground earlier, 1gm weight will rach the ground earlier, bother will reach the ground at the same time)

49. If the velocity of the body is uniform then __________.

(Its speed remains uniform, Its speed and direction of motion will remain the same, Its acceleration is uniform)

50. If a particle is moving with constant speed in a circle then its velocity is __________.

(Zero, Uniform, Variable)

Chapter 4 - Motion in Two Dimensions

1. The motion of a body along a straight line is called __________.

(Linear Motion, Angular Motion, Vibratory Motion)

2. The motion of a body along a curved path is called __________.

(Linear Motion, Angular Motion, Vibratory Motion)

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3. The example of motion of the body in two dimensions is __________.

(Ball moving along a straight line, Progectile, Train moving along a straight track)

4. In projectile motion the object is purely under the influence of __________.

(Centripetal Force, Force of Gravity, Restoring Force)

5. In projectile motion (freely falling bodies) sign assigned to the acceleration due to gravity (g) will always be __________.

(Positive, Negative, None of these)

6. In considering the projectile motion all the vectors like, velocity and displacement along positive y-axis will be taken as __________.

(Positive, Negative, None of these)

7. During the projectile motion, the vertical component of a velocity __________.

(Changes, remains the same, None of these)

8. During the projectile motion, the horizontal component of the velocity __________.

(Increases, Remains the same, Decreases)

9. The path of the projectile is __________.

(Parabolic, Hyperbolic, Elliptical)

10. During the projectile motion the acceleration along the horizontal direction will __________.

(Decrease, Increase, be Zero)

11. In projectile the acceleration along vertical direction will __________.

(Decrease, Increase, Remain the same)

12. The expression for the time to reach the maximum height of the projectile is __________.

(Vosinq/g, 2Vosinq/g, Vosinq/2g)

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13. The expression for the total time of flight of the projectile is __________.

(Vosinq/g, 2Vosinq/g, Vosinq/2g)

14. The expression for maximum height reached by the projectile is __________.

(Vo2sin2q/g, Vosin2q/2g, Vo2sin2q/2g)

15. The expression for the horizontal range of the projectile is __________.

(Vo2sin2q/g, Vosin2q/g, Vo2sin2q/2g

16. The expression for the maximum range of the projectile is __________.

(Vo2/g, Vosin2q/2g, Vosinq/2g)

17. For the maximum range of the projectile the angle of elevation must be __________.

(0°, 45°, 90°)

18. The horizontal range of the projectile is directly proportional to the __________.

(Initial Velocity, Square of the initial velocity, Square root of the initial velocity)

19. The horizontal range of the projectile is directly proportional to the __________.

(sine of the angle of elevation, sine of the twice of the angle of elevation, square of the sine of the angle of elevation)

20. The expression for the trajectory of the projectile is __________.

(ax – ½ bx2, a/x – bx2/2, ax – bx2)

21. In projectile motion the small angle of elevation produces __________.

(Flat Trajectory, High Trajectory, Low trajectory)

22. In projectile motion the large angle of elevation produces __________.

(Flat trajectory, Low Trajectory, High trajectory)

23. If the angle of elevation of the projectile is 90° then its horizontal range will be __________.

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(Minimum, Zero, Maximum)

24. For the projectile with high trajectory their time of flight will be __________.

(Short, Long, None of these)

25. For the projectile with low trajectory, their time of flight will be __________.

(Short, Long, None of these)

26. If a projectile has some horizontal range at an angle of elevation of 15° then its range will be the same when the angle of elevation is equal to __________.

(30°, 45°, 75°)

27. At maximum height, the vertical component of the velocity of the projectile is __________.

(Minimum, Zero, Maximum)

28. Horizontal motion with constant velocity and vertical motion with constant acceleration is called __________.

(Rectilinear Motion, Projectile Motion, Circular Motion)

29. A ball is thrown horizontally from a height of 400m with a muzzle velocity of 100m/s. It experiences a horizontal acceleration equal to __________.

(50m/s2, 9.8 m/s2, zero)

30. If a shell is fired with the velocity of 9.8 m/s at an angle of 45° then its horizontal range will be __________.

(Zero, 4.9m, 9.8m)

31. A projectile is fired horizontally with an initial velocity of 20m/s. after 3 seconds its horizontal component of velocity is __________.

(60m/s, 6.67,20 m/s)

32. In projectile motion __________ of the following angle will result the maximum range.

(20°, 45°, 60°)

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33. An aeroplane moving horizontally with a velocity of 100m/s, drops a food packet while flying at a height of 490m. The packet will strike the ground from the point just vertically below the point of the projection at a distance of __________.

(980m, 1000, 1960 m)

34. The ball A is dropped from the top of a building simultaneously the ball B is thrown horizontally then __________.

(ball A strikes the ground first, ball B strikes the ground first, both ball A and B will strike the ground simultaneously)

35. If the launch angle of a locust is 55° and its range is 0.8 m then the take off speed of a locust is __________.

(2 m/s, 2.9 m/s, 3.9 m/s)

36. __________ should be the initial velocity of a rocket if it to hit a target 1000 km away.

(3130.5 m/s, 313.5 m/s, 31.35 m/s)

37. If an object is moving with constant speed along a circle then its motion is __________.

(Linear, Vibratory, Uniform Circular)

38. The expression for the time period of an object moving with constant speed v along a circle of radius r is given by __________.

(4pr/v, 2pr/v, pr2/v)

39. The angle subtended by an object with the centre of the circle when its is moving from one point to another on its circumference is called __________.

(Angular Displacement, Angular Speed, Angular Acceleration)

40. The unit of angular displacement in system of measurement is __________.

(Radian, m/s, rad/s)

41. The central angle subtended by an arc whose length is equal to the radius of the circle is equal to one __________.

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(Radian, Degree, Gradient)

42. The relation linear (s) and angular (q) displacements is given by __________.

(s = rq, s = r/q, q = sr)

43. In the relation s = rq, q will always be measured in __________.

(Degrees, Radian, None of these)

44. One radian is equal to __________.

(5.73 degrees, 57.3 degrees, 53.7 degree)

45. One degree is equal to __________.

(0.017 rad, 17.45 rad, 1.74 rad)

46. The angular displacement or shift per unit time is called __________.

(Angular Speed, Angular Velocity, Angular Acceleration)

47. One revolution is equal to __________.

(2p rad, p/2 rad, 4p rad)

48. 1 radial is equal to __________.

(2prevolution, p/2 rad, p1/2 revolution)

49. The direction of angular velocity is always along the axis of rotation and it can be determined by __________.

(Head to tail rule, Right hand rule, None of these)

50. If an object is rotating in the counter-clockwise direction then the direction then the direction of angular velocity is __________.

(Into the plane, Out of the plane, None of these)

51. If a particle with instantaneous linear velocity ‘v’ is rotating along the circumference of circle of radius ‘r’ then the relation between angular velocity (w) and its linear velocity (v) is given by __________.

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(v = w/r, v = rw, w = vr)

52. If a particle covers equal angular displacement in equal interval of time then its angular velocity is __________.

(Variable, Uniform, Average)

53. The rate of change of angular velocity is called __________.

(Angular Displacement, Angular Acceleration, None of these)

54. The unit of angular acceleration in SI system is __________.

(deg/s2, m/s2, rad/s2)

55. The relation between linear acceleration (a) and angular acceleration (a) of a particle is given by __________.

(a = ra, a = a/r, a = ar)

56. The velocity of the particle tangent to its circular path is called __________.

(Angular Velocity, Uniform Angular Velocity, Tangential Velocity)

57. In circular motion the time period and angular velocity of a particle are __________.

(Directly proportional to each other, Inversely proportional to each, none of these)

58. If a particle is moving with constant speed along the circumference of a circle then the acceleration possessed by the particle is __________.

(Linear Acceleration, Centripetal Acceleration, None of these)

59. The direction of centripetal acceleration will always be __________.

(Towards the centre of the circle, Aways from the centre of the circle)

60. The force, which produces the centripetal acceleration, is called __________.

(Centrifugal Force, Gravitational Force, Centripetal Force)

61. The expression for centripetal acceleration is given as __________.

(v/r, v2/r, r2w)

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62. The expression for centripetal acceleration in terms of time period (T) is given as __________.

(4pr2/T, 4pr/T, 4p2r/T2)

63. The force, which keeps the body in circular motion and always directed towards the centre of the circle is called __________.

(Force of Gravity, Centripetal Force, Centrifugal Force)

64. The acceleration of the body or particle tangent to the circular path is called __________.

(Centripetal Acceleration, Tangential Acceleration, None of these)

65. In circular motion the tangential component of acceleration arises when __________.

(speed of the object is changed, speed of object is constant, direction of motion of the object is changed)

66. In circular motion the centripetal component of acceleration arises when __________.

(speed of the object is changed, speed of the object is constant, direction of motion of object is changed)

67. Centripetal acceleration and tangential acceleration are always __________.

(Parallel to Each other, Perpendicular to each other, None of thse)

68. A car is travelling at a constant speed of 20m/s rounds a curve of radius 100m. What is its acceleration.

(2m/s2, 3m/s2, 4m/s2)

69. If the speed of the object moving in a circle is doubled then centripetal force __________.

(Remains the same, Becomes half of its initial value, Becomes from times than its initial value)

70. When an object moves round the circular track, the centripetal force is provided by __________.

(Force of Gravity, Fictious Force, Frictional Force)

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