Chemistry Multiple choice questions(50) with answer
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Multiple choice questions
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Q 1 Who is regarded as father of modern chemistry ?
• Ruterford
• Einstein
• Lavoisier
• C.V Raman
Answer: Lavoisier
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Q2. Identify the wrong statement in the following?
• Atomic radius of the elements increases as one moves down the first group of the periodic table
• Atomic radius of the elements decreases as one moves across from left to right in the 2nd period of the
• Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius
• Amongst isoelectronic species, greater the negative charge on the anion, larger is the ionic radius
Answer: Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius
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Q3. The term PVC used in the plastic industry stands for
• Polyvinyl chloride
• Polyvinyl carbonate
• Phosphor vanadiu chloride
• Phosphavinyl chloride
Answer: Polyvinyl chloride
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Q4. The number of moles of solute present in 1 kg of a solvent is called its
• Molality
• Molarity
• Normality
• Formality
Answer: Molality
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Q5. The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called
• Granite
• Basalt
• Igneous rocks
• Sedimentary rocks
Answer: Igneous rock
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Q6. The octane number of zero is assigned to
• 2- methyl octane
• N- heptane
• Iso- octane
• 3- methyl octane
Answer: n-heptane
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Q7. Which is used in preparation of dynamite ?
• Glycerol
• Ethyl alochol
• Methyl alcohol
• Glycol
Answer: Glycerol
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Q8. Bleaching action of chlorine is by
• Decomposition
• Gydrolysis
• Reduction
• Oxidation
Answer: Decomposition
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Q9. What is a mixture of potassium nitrate powdered charcoal and sulphur called?
• Paint
• Aluminium
• Brass
• Gun powder
Answer: Gun powder
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Q10. Nail polish remover contains ?
• Benzene
• Acetic acid
• Acetone
• Petroleum ether
Answer: Acetone
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Q11. The isotope atoms differ in ?
• Number of protons
• Atomic number
• Number of electrons
• Atomic weight
Answer: number of electrons
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Q12. Natural rubber is polymer derived from ?
• Ethylene
• Propylene
• Isoprene
• Butadiene
Answer: isoprene
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Q13. Which is also called Stranger Gas ?
• Xenon
• Neon
• Argon
• Nitrous oxide
Answer: Xenon
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Q14. The chemical used as a fixer in photography is ?
• Sodium thio sulphate
• Sodium sulphate
• Borax
• Ammonium sulphate
Answer: sodium thio sulphate
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Q15. Water drops are spherical because of ?
• Viscosity
• Density
• Polarity
• Surface tension
Answer: surface tension
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Q16. he oxide of Nitrogen used in medicine as anaesthetic is ?
• Nitrogen pentoxide
• Nitrous oxide
• Nitric oxide
• Nitrogen dioxide
Answer: nitrogen pentoxide
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Q17. Which one of the following metals does not react with water to produce Hydrogen?
• Cadmium
• Lithium
• Potassium
• Sodium
Answer: cadmium
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Q18. The most electronegative element among the following is
• Sodium
• Bromine
• Fluorine
• Oxygen
Answer: fluorine
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Q19. The metal used to recover copper from a solution of copper sulphate is ?
• Na
• Ag
• Hg
• Fe
Answer: Fe
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Q20 The metallurgical process in which a metal is obtained in a fused state is called ?
• Roasting
• Calcinations
• Smelting
• Froth floatation
Answer: smelting
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Q21. Which of the following is produced during the formation of photochemical smog ?
• Nitrogen oxides
• Hydrocarbons
• Methane
• Ozone
Answer: ozone
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Q22. Which of the following gas is used in cigarette lighters ?
• Butane
• Propane
• Methane
• Ethane
Answer: butane
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Q23. Iodine can be separated from a mixture of Iodine and Potassium Chloride by ?
a) Filtration
b) Sublimation
c) Distillation
d) Sedimentation
Answer: sublimation
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Q24. The material which can be deformed permanently by heat and pressure is called a
• Thermoset
• Thermoplastic
• chemical compound
• Polymer
Answer: thermoset
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Q25. . Conduction band electrons have more mobility than holes because they are
• experience collision more frequently
• experience collision less frequently
• have negative charge
• need less energy to move them
Answer: experience collision less frequently
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Q26. The gas used for artificial ripening of green fruit is ?
• Ethane
• Ethylene
• carbon dioxide
• Acetylene
Answer: ethylene
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Q27. The main chemical constituent of clay is ?
• aluminium silicate
• Zeolites
• aluminium borosilicate
• silicon oxide
Answer: aluminium silicate
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Q28. What is hottest part of the gas flame is called ?
• blue zone
• luminous zone
• dark zone
• non-luminous zone
Answer: non-luminous zone
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Q29. Permanent hardness of water is due to the presence of ?
• Magnesium bicarbonate
• Calcium bicarbonate
• Sodium bicarbonate
• Calcium sulphate
Answer: Calcium sulphate
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Q30. Sugars are converted in the liver into
• Glycogen
• Vitamin
• Monosaccharide
• None of above
Answer: glycogen
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Q31. The ejection of electrons when a metal surface is irradiated is known as
• Black body radiation
• Photoelectric effect
• Zeeman effect
• Atomic spectrum
Answer: photoelectric effect
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Q32. Which of the following gases is the most toxic?
• Carbon dioxide
• Sulphur dioxide
• Carbon monoxide
• Acetic acid
Answer: carbon monoxide
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Q33. Which of the following elements behave chemically both as a metal and a non metal?
• Boron
• Carbon
• Argon
• Mercury
Answer: boron
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Q34. Why is phosphorus kept under water ?
• to make it wet
• to make it durable
• water forms a protective coating on it
• to save it from catching fire when exposed to dry air
Answer : to save it from catching fire when exposed to dry air
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Q35. What is extracted from Bauxite ?
• Mica
• Aluminium
• Copper
• Tin
Answer: aluminium
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Q36. Brass is an alloy of ?
• Copper and Tin
• Copper and Zinc
• Copper and Aluminium
• Iron and Copper
Answer: copper and zinc
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Q37. Contact lenses are made from ?
• Polyvinyl chloride
• Teflon
• Polystyrene
• Lucite
Answer: Polyvinyl chloride
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Q38. The single acid which dissolves gold is ?
• Aqua regia
• Hydrochloric acid
• Nitric acid
• Selenic acid
Answer: aqua regia
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Q40. How many different oxides are formed by nitrogen ?
• Two
• Three
• Four
• Five
Answer: two
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Q41. The major component used in preparation of different types of glasses is :
• Sodium borate
• Sodium silicate
• Silica
• Calcium silicate
Answer: silica
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Q42. What is metallurgy ?
• process of extracting metal in pure form from its ore.
• process of creating alloys of metals.
• process of making metals live long.
• None of above.
Answer: process of extracting metal in pure form from its ore
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Q42. Which have maximum number of isotopes ?
• Bromine
• Aluminium
• Polonium
• Carbon
Answer: polonium
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Q43. Which prefix is often used with scientific terms to indicate that something is the same, equal or constant
• Iso
• Mega
• Meta
• Quasi
Answer: iso
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Q44. Superconductivity is a material property associated with
• cooling a substance without a phase change
• frictionless liquid flow
• a loss of thermal resistance
• a loss of electrical resistance
Answer: a loss of electrical resistance
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Q45. Which of the following is primarily composed of calcium carbonate?
• Fish scales
• Shark teeth
• Oyster Shells
• Whale bones
Answer: oyster shells
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Q46. Water flows through a horizontal pipe at a constant volumetric rate. At a location where the cross sectional area decreases, the velocity of the fluid
• Increases
• Decreases
• Stays the same
• None of the above
Answer: increases
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Q47. Vacuoles are bound by a definite membrane in plant cells called
• Plasma membrane
• Tonoplast
• Cell wall
• None of the above
Answer: Tonoplast
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Q48. The wonder pigment chlorophyll is present in
• Mitochondria
• Centrosomes
• Quantosomes
• Lysosomes
Answer: Quantosomes
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Q49. The concept of carbon credit originated from which one of the following?
• Earth Summit, Rio de Janeiro
• Kyoto Protocol
• Montreal Protocol
• G-8 Summit, Hciligendamm
Answer: Kyoto protocol
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Q50. Select the one which is not a mixture
• Air
• Gasoline
• LPG
• Distilled water
Answer: distilled water
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