1. The document contains 50 multiple choice questions from a 1997 chemistry exam. 2. The questions cover a wide range of chemistry topics including organic chemistry, inorganic chemistry, physical chemistry, and thermodynamics. 3. Multiple answer choices are provided for each question, with one being the correct answer.

1. AFMC–Past papersCHEMISTRY - UNSOLVED PAPER - 1997

2. SECTION – I (Total Marks :50)Single Correct Answer TypeThere are five parts in this question. Four choices are given for each part and one of them is correct. Indicate you choice of the correct answer for each part in your answer-book by writing the letter (a), (b), (c) or (d) whichever is appropriate

3. 01ProblemOrlon is polymer of AcrylonitrileStreneTetrafluoroethyleneVinyl chloride

4. Problem02Marsh gas containsH2SC2H2COCH4

5. Problem03Which of the following is true for diamond?Diamond is a bad conductor of heatDiamond is a good conductor of electricityDiamond is made up of C,H and ODiamond is soft

6. Problem04In the commercial gasolines the type of hydrocarbons which are more desirable isLinear unsaturated hydrocarbonBranched hydrocarbonTolueneStraight-chain hydrocarbon

7. Problem05Which lanthanide is most commonly used?ThoriumLanthanumCeriumNobelium

8. Problem06Electronic formula of chromium is3d44s13d64s13d44s23d54s1

9. Problem07Which of the following reacts with chloroform and a base to form phenylisocyanide?Benzene AnilineNitrobenzenePhenol

10. Problem08Acetamide reacts with P2O2 (Phosphorus pentoxide) to giveEthyl cyanideMethyl cyanideEthyl isocyanateMethyl cyanate

11. Problem09C12H22O11+H2O C6H12O6(aq)+C6H12O6(aq)Sucrose fructose glucoseIn the above reaction dilute H2SO4 isHeterogeneous catalystHomogeneous catalystDoes not effect the reactionNone of these

12. Problem10If Ksp for HgSO4 is 6.4 x10-5, then solubility of the salt is6.4 x 10-58 x 10-36.4 x 10-38 x 10-6

13. Problem11Which of the following can be used for dating fossil?157N146C4020Ca126C

14. Problem12Which of the following is not efflorescent?NaOHCu SO4MgSO4Hydrated Cu SO4

15. Problem13How much quick lime can be obtained from 25g?56g14g60g28g

16. Problem14Cyanide and isoyanide are isomers of typeTautomerPositionalStructuralFunctional

17. Problem15Which of the following is heavy water?H20H2018D20H2O16

18. Problem16The test of ozone O3 can be done byAuAgCuHg

19. Problem17Which of the following gases has electronic configuration 1s22s22p1x2p1y2p1z?HydrogenOxygenFluorineNitrogen

20. Problem18Which of the following statement is correct?Hydrogen will not be liberated at anodeHydrogen has oxidation number -1 and +1Hydrogen has same Ionization potential as alkali metalsHydrogen has same electro negativity as halogens

21. Problem19Which of the following is the largest stable atom?U BiPbA1

22. Problem20Which of the following has square planar structure?[Ni(CN)4]2-NiC14]2-[Cr(CN)6]3-[Ni(CO)4]

23. Problem21Which of the following is paramagnetic?[Ni(CN)4]2-[Ni(CO)4]NiC14]2-[Co(NH3)6]3+

24. Problem22Which statement is not correct about alcohol?Alcohol of less no. of carbon atoms is less soluble in water than alcohol of high no of carbon atomsAlcohol is lighter than waterAlcohol evaporates quicklyAll of these

25. Problem23Which of the following is a simple ether?C6H,OCH3CH3OCH3C6H5OC2H5C2H5OCH3

26. Problem24Arrange the following in increasing order of basicity CH3NH„ (CH3)2NH, C6H5NH2, (CH3).NC6H5NH2 < (CH3)3N < CH3NH2 < (CH3)2NHReverse of (a)(ch3)3n < (ch3)2nh < ch3nh2 < c6h5nh2Reverse of (c)

27. Problem25Arrange the following in increasing order of acidity H3P04, H2C03 HC1, HiH2C03, H3P04, HC1, HIH2P04, HC1, H2C03, HIHC1, HI, H2C03, H3P04H3P04, H2C03HC1, HI

28. Problem26Which of the following atomic mass of uranium is the most radio-active ?226238248235

29. Problem27Which of the following is the IUPAC name of the compound?Image*4-methyl-2-hexanol4-methyl-3-hexanol2-methyl-3-hexanol3-methyl-4-hexanol

30. Problem28If electron falls from n = 3 to n = 2, then emitted energy is1.9 eV 10-2eV 0-65 eV 12-09 eV.

31. Problem29Arrange the elements - Na, Rb, K, Mg in increasing order of atomic radiusNa < Mg < K < RbMg < Na < K < RbRb < K < Mg < NaK < Na < Mg < Rb.

32. Problem30Which of the following cannot be formed ?He He2+He He+.

33. Problem31Number of protons, neutrons and electrons in the element 89y231 is89, 142, 89 89, 231, 8989, 71, 8989, 89, 242

34. Problem32The position is1H1-1e00n1+1e0

35. Problem33When oxalic acid is dehydrated by conc. H2SO4, then it formsCO2C+CO2CO + CO2CO

36. Problem34What is the value of decay constant of a compound having half-life time, (T)1/2=2.95 days?2.7 x 10-6s-12.7 x 10-5s-13.105s-12.7 x 106s-1

37. Problem35Which of the following has the highest weight ?normal adult man10 litres of Hgall have same weight.1 m3 water

38. Problem36Volume occupied by 4. 4 grams of C02 is224 litres2.24 litres22.4 x 102litres22.4 litres

39. Problem37 First law of thermodynamics is represented by the EquationW = Q +∆E&E = Q + WQ = W -∆E ∆E = Q - W.

40. Problem38Which of the following is correct relationship ?∆G = ∆H - T∆S∆G =∆H + T∆S∆G + ∆H = T∆S∆H =∆G - T∆S.

41. Problem39Number of isomers of C4H10 is4Isomerism not exist32

42. Problem40In Friedal - Craft's alkylation, besides A1C13 the other reactants areC6H6 + NH2C6H6 + CH3ClC6H6+ CH3COC1C6H6 + CH4.

43. Problem41Which of the following is a mixed ketone ?benzophenone3-pentanonebutanoneacetophenone

44. Problem42Iodoethane reacts with sodium in the presence of dry ether. The product is ButanePentaneButanePropane

45. Problem43BF3 is acid according toBronzed & LowryArrheniusLewis All of these

46. Problem44A base dissolved in water yields a solution with a hydroxide ion concentration of 0-05 mol litre~ . The solution isNeutralBasicAcid Both (b) and (c)

47. Problem45Azeotropic mixture of HC1 and H20 has36% HC1 48% HC120.2%HC122.2%HC1

48. Problem46In which of the following case Kp is less than kc?2SO2+O2=2SO3PC15=PC13+C12H2+C12=2HC1All of these

49. Problem47If concentration of reactants is increased by x then the K becomesK+xIn K/xKK/x

50. Problem48Which of the following is ferroelectric compound/Pb2O3BaTiO3PbZrO3K4[Fe(CN)6]

51. Problem49Which of the following shows geometrical isomerism?Propene1-bithene1, 1-dichlorobutane2-butene

52. Problem50Aromatic hydrocarbon shows mostlysubstitution electrophilic reactionsaddition electrophilic reactionssubstitution nucleophilic reactionsaddition nucleophilic reactions

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