Chemistry Paper AITS

RESONANCE P1R180710C0-1

(SPACE FOR ROUGH WORK)

PART-IAtomic masses : [H = 1, D = 2, Li = 7, C = 12, N = 14, O = 16, F = 19, Na = 23, Mg = 24, Al = 27, Si = 28,P = 31, S = 32, Cl = 35.5, K = 39, Ca = 40, Cr = 52, Mn = 55, Fe = 56, Cu = 63.5, Zn = 65, As = 75,Br = 80, Ag = 108, I = 127, Ba = 137, Hg = 200, Pb = 207]

SECTION - IStraight Objective Type

This section contains 8 multiple choice questions. Each question has choices (A), (B), (C) and (D), outof which ONLY ONE is correct.

1. How much volume of 63% w/w aq. HNO3 solution (d = 1.5 g/ml) is diluted with sufficient water to prepare1 L of 3 M HNO3 solution(A) 200 ml (B) 300 ml (C) 1200 ml (D) 1300 ml

2. Br2 () + Cl2 (g) 2BrCl (g)excess

25 ml of Br2() react completely with Cl2 (g) and forms BrCl (g). How much volume of BrCl (g) will form at STP.Density of Br2 () is 3200 Kg /m3. ( Assume molar volume of an ideal gas is 22.4 L.) [Br = 80, Cl = 35.5](A) 11.2 litre (B) 22.4 litre (C) 50 ml (D) 25 ml

3. A chemist decided to determine the Emprical formula of an unknown compound. He collects followinginformations :(I) Compound contains 2 : 1 ratio of 'H' and 'O' atoms(number of atoms).(II) Compound has 40% C by mass(III) Compound contains C, H and O only.What is the empirical formula of the compound :(A) CH3O (B) CH2O (C) C2H2O (D) CH3O2



4. A 25 ml volume of 0.3 M H3PO3 is completely titrated with 45 ml of Ba(OH)2. The molarity of Ba(OH)2

solution is :(A) 0.348 M (B) 0.500 M(C) 0.167 M (D) 0.250 M

5. Hydrazine reacts with KIO3 in presence of HCl as

N2H4 + IO3– + 2H+ + Cl– ICI + N2 + 3H2O

The equivalent masses of N2H4 and KIO3 respectively are : [N = 14, K = 39, I = 127, O = 16](A) 8 and 53.5 (B) 16 and 53.5(C) 8 and 35.6 (D) 8 and 87

6. The correct decreasing order of preferance of functional group during the IUPAC nomenclature of polyfunctionalgroups compound is :

(A) –CONH2, –COCl, –CN, –CHO (B) – COOH, OO||||

–C–O–C– , –OH, –CHO

(C) –CHO, –CN, –NH2, –OH (D) – COOR,

O||

X–C– , – CN,

O||

R–C– (Ketone)



7. Select the structure with correct numbering for IUPAC name of the compound :

(A)

(B)

(C)

(D)



8. Number of isomers represented by molecular formula C5H10O2 which have most prior functional group inIUPAC system.(A) 2 (B) 3 (C) 4 (D) 5

SECTION - IIMultiple Correct Answers Type

This section contains 4 multiple correct answer(s) type questions. Each question has 4 choices (A),(B), (C) and (D), out of which ONE OR MORE is/are correct.

9. Which of the following molarity values of ions are correct for a aqueous solution which contain 5.85 % w/vNaCl, 5.55% w/v CaCl2 and 6% w/v NaOH. [Na = 23, Cl = 35.5 , Ca = 40, O = 16 ](A) [Cl–1] = 2M (B) [Na+] = 1M (C) [Ca2+] = 0.5 M (D) [OH–] = 1.5 M

10. For CuSO4.5H2O, which is incorrect mole relationship.(A) 9 × mole of Cu = mole of O atom (B) 5 × mole of Cu = mole of O atom(C) 9 × mole of Cu = mole of O2 molecule (D) mole of Cu = 5 × mole of O atom

11. Lithium metal reacts with nitrogen gas to produce a white solid Lithium nitride (Li3N) according to the reac-tion:

6 Li (s) + N2 (g) 2Li3N(s)If 8.4 g of Li is taken initially with excess of N2 (g) then :(A) Volume of nitrogen gas consumed at STP is 4.48 L(B) Total mass of the product obtained is 14g(C) Total number of atoms obtained in the product is 1.6 NA(D) Lithium and nitrogen combine in ratio 3 : 2 by mass.



12. Molecular formula C4H8O will show :(A) chain isomerism (B) position isomerism(C) functional group isomerism (D) metamerism

SECTION - IIIComprehension Type

This section contains 2 paragraphs. Based upon each paragraph, 3 multiple choice questions have tobe answered. Each question has 4 choices (A), (B), (C) and (D), out of which ONLY ONE is correct.

Paragraph for Question Nos. 13 to 15

632 g of sodium thiosulphate (Na2S2O3 ) reacts with copper sulphate to form cupric thiosulphate which isreduced by sodium thiosulphate to give cuprous compound which is dissolved in excess of sodium thiosulphateto form a complex compound sodium cuprothiosulphate ( Na4[Cu6(S2O3)5] ).

CuSO4 + Na2S2O3 CuS2O3 + Na2SO4

2CuS2O3 + Na2S2O3 Cu2S2O3 + Na2S4O6

3Cu2S2O3 + 2Na2S2O3 Na4[Cu6(S2O3)5]

Sodium cuprothiosulphateIn this process, 0.2 mole of sodium cuprothiosulphate is formed. (O = 16, Na = 23, S = 32)

13. The average oxidation states of sulphur in Na2S2O3 and Na2S4O6 are respectively.(A) + 5 & + 2 (B) + 2 & + 2.5 (C) + 5 & 2.5 (D) + 2 & + 4

14. Moles of sodium thiosulphate reacted and unreacted after the reaction are respecticvely.(A) 3 & 2 (B) 2 & 3 (C) 2.2 & 1.8 (D) 1.8 & 2.2



15. If instead of given amount of sodium thiosulphate, 8 moles of sodium thiosulphate along with 3 moles ofCuSO4 were taken initially. Then moles of sodium cuprothiosulphate formed and remaining mole of Na2S2O3are respectively :(A) 0.5, 5.5 (B) 0.5, 2.5 (C) 1.5, 4 (D) 2, 2.5

Paragraph for Question Nos. 16 to 18While naming unsaturated hydrocarbons, lowest locant is alloted for multiple bond than any substituent,since the priorty of multiple bond is more than any substituent present. When the locant for unsaturated issame from either side then double bond is given priority over triple bond. For main chain selection if the sizeof main chain and number of unsaturation are equal, then priority is given to the lowest set of locants forunsaturation.

16. IUPAC name of the following compound is

(A) 3-(Prop-2-ynl)hexe-1,3,5-triene (B) 4-Ethenylhepta-1, 3-dien-6-yne(C) 4-Ethenylhexa-4, 6-dien-1-yne (D) 4-(Prop-2-ynyl) hexa-1,3,5-triene


(A) 4–Fluoro–1–methoxypent–1–yn–4–ene (B) 1–Fluoro–1–methyl–4–methoxybut–1–en–3–yne(C) 4–Fluoro–1–methoxypent–3–en–1–yne (D) 2–Fluro–5–methoxypent–2–en–4–yne




(A) 3–(cyclohexa–1, 3-dienyl)cyclohexa-1,4-diene (B) 4–(cyclohexa–2, 5-dienyl)cyclohexa-1,3-diene(C) 2–(cyclohexa–1, 3-dienyl)cyclohexa-1,3-diene (D) 1–(cyclohexa–2, 5-dienyl)cyclohexa-1,3-diene

SECTION - IVTrue & False Type

This Section Contains 4 questions. Each question is either true (T) or false (F).

19. Vapour density of mixture of NO2 and N2O4 decreases with temp because N2O4 decompose into NO2 onheating.

20. The valency factor of H3PO4 against reaction with NaOH, where it form monohydrogenphosphate salt, isequal to '2'.

21. If all the oxygen from 40g SO3, 22 g CO2 and 9 g H2O is made to combine to form oxygen gas, then thevolume of oxygen gas produced at NTP is 67.2 L.

22. All structural isomers have same general formula and different physical properties.



SECTION - VInteger Answer Type

This section contains 4 questions. The answer to each of the questions isa single digit integer, ranging from 0 to 9. The appropriate bubble below therespective question number in the ORS have to be darkened.

23. 5.6 g of an oxide of a hypothetical metal required 2.4 g coke for its complete reduction to metal along with theproduction of CO gas. Find the equivalent weight of metal in case of given metal oxide.

24. In the reaction, xHI + yHNO3 NO + 2 + H2O. Calculate the sum of (x + y) value for per mole of nitricoxide in balanced reaction.

25. How many moles of cuprous sulphide could be oxidised by 4 moles of acidified K2Cr2O7 solution to producea bent-shaped gas (SO2) and Cu2+ ?

26. The total number of metamers possible for a compound with the molecular formula C5H12O.

Chemistry Paper AITS

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