1. AFMC–Past papers CHEMISTRY - UNSOLVED PAPER - 2008

2. SECTION – I (Total Marks :50) Single Correct Answer Type There 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. 01 Problem White vitriol is FeSO4-7H2O CuSO45H2O NiSO4-6H2O ZnSO4-7H2O

4. Problem 02 Mustard gas is dichlrodiethylsulphide dichlorodimethylsulphide dichlorodimethyiether none of these

5. Problem 03 Maximum number of unpaired electrons are present in ground state of Mn Zn Cu Cr

6. Problem 04 Which one is the most stable hydride ? LiH KH MgH2 CaH2

7. Problem 05 Maximum ionisation energy is associated with K Na Rb Mg

8. Problem 06 Covalent nature of A1C13 would be judged by Fajan's rule Molecular orbital theory VBT VSEPR

9. Problem 07 Maximum dipole moment value is possible in XV2 if the angle is 120° 90° 180° 150°

10. Problem 08 van der Waal's gas equation is used for real gas ideal gas mixture of both Vapour

11. Problem 09 Which one is not a property of ozone ? it acts as an oxidising agent in dry state oxidation of K1 into K1O2 PbS is oxidised to PbSO4 Fig is oxidised to Hg2O

12. Problem 10 Which of the following substance produces H2O2 on reaction with H2SO4 ? Na2O2 PbO2 MnO2 Na

13. Problem 11 Which of the following substance are used - chromyl chloride test ? Kr2Cr2O7 K2CrO4 Cr2O3 CrO2Cl2

14. Problem 12 What is the value of Kr if kb and kfare 1.2 x 106 and 1.4 x 10-2 respectively ? 11.66 0.88 1.166 8.8

15. Problem 13 Buffer solution has pH = 0 is acidic is basic Either acidic or basic

16. Problem 14 In Lassaigne's test red colour precipitate is obtained which is due to formation of FeCNS Fe(CNS)2 NaCNS Fe(CNS)3

17. Problem 15 Which one is paraldehyde ? (CH3CHO)3 (CH3CHO)n (HCHO)n (HCHO)3

18. Problem 16 What is the value of i for H3PO4 in ideal conditior 4 3 5 6

19. Problem 17 Solubility of CO2 in cold H2O can be increased by increase in temperature increase in pressure increase in volume decrease in pressure

20. Problem 18 Which of the following is optically active ? 2-methylpentane ethanolamine citric acid glycerol

21. Problem 19 Alkyl halide cannot be obtained from alkanealkene by reaction with HBr PC15 Cl2 HCL

22. Problem 20 Palmitic acid is C15H31COOH CI8H3 7COOH C25H5lCOOH C23H47COOH

23. Problem 21 Pernitric acid is HNO2 HNO3 HNO4 H2N2O3

24. Problem 22 How much CO2 will be released by reaction of 10 g CaCO3 with excess of dil. HCL 44 g 4.4 g 88 g 0.4 g

25. Problem 23 How much volume of H2 will be released by passing a current of 2 ampere for 2 hours in acidic water ? 1.67 L 16.7 L 167 L 22.4 L

26. Problem 24 Find the number of oxygen atoms in 14.6 g Mg(HCO3)2 0.6 NA 5 NA 6 NA 4 NA

27. Problem 25 The existence of keto group in EAA can be justified by reaction with Na NaHSO3 FeCl3 NaOH

28. Problem 26 What is used to heal wound ? FeCI3 NaCl PbSO4 FeSO4

29. Problem 27 What is the concentration of CO, in atmosphere ? 0.003% 0.034% 3.4% none

30. Problem 28 Which ofthe following is disproportion reaction ? Cu+ ->Cu2+ + Cu Fe-> Fe2+ Zn + Cu2+ -> Cu + Zn2+ 2CUI2 -> Cu2L2 + 12

31. Problem 29 When acetone is heated with concentrated H2SO4 the product formed is mesityl oxide phorone mesitylene diacetone alcohol.

32. Problem 30 Copper atoms are lying on 8 corners and silver atoms on 6 faces while Au at the body centre. Find the formula. CuAg3Au Cu3Au3Ag CuAgAu Cu2AuAg

33. Problem 31 AS is negative in case of stretching of rubber limestone evaporation boiling of egg

34. Problem 32 Name 1UPAC name of CH3 - CH – COOH α-hydroxypropionic acid 2-hydroxy propanoic acid lactic acid propan-2-oi-l-oic acid

35. Problem 33 Write the IUPAC name of epichlorohydrin 2-chloroethanol 2-hydroxyethyichloride ethylenehydroxychloride 3-chloropropan-l, 2-epoxide

36. Problem 34 POP can be hardened by dehydration oxidation reduction hydration

37. Problem 35 A system absorbs 200 J heat at constant temperature and it does work on surrounding with a pressure of 0.5 atm and the volume increases from 1L to 10 L. The values of q, w, and E are +200 J, -454.5 J and - 254.5 J - 200 J, + 454 J and - 254.5 J - 200 J, - 454 J and + 254.5 J + 200 J, + 454 J and + 254.5 J

38. Problem 36 CuFes2-> This reaction is concerned with roasting calcination smelting all of these

39. Problem 37 HBr reaction is concerned with 30 alcohol 20 alcohol Phenol ethanol

40. Problem 38 Atmospheric pressure is approximately 1.01 x 105Nm2 1.01 x 105 Nm2 1.01 x 104 Pa 76 torr

41. Problem 39 Coordination number in fee unit cell is 6 : 6 12 : 12 5 : 5 8 : 8

42. Problem 40 pH of blood is <7 >7 but < 8 > 8 but < 10 > 10

43. Problem 41 Pyrites are heated to remove S02 by Roasting Calcinations Smelting Reduction

44. Problem 42 Microgram is written as 103g 106g 10-3 g 10-6g

45. Problem 43 In the electrolysis of dilute H2SO4 using platinum electrode, O2 is produced at the cathode SO2 is obtained at cathode H2 is liberated at the cathode O2 is produced at the anode.

46. Problem 44 Glycerol is used as a sweetening agent in the manufacture of good quality soap in the manufacture of nitro glycerine in all of the above.

47. Problem 45 Gold number gives the amount of gold sol present in the colloid the amount of gold sol required to coagulate the colloid the amount of gold sol required to break the colloid none of these

48. Problem 46 The wavelength of the radiation emitted when an electron drops from 3rd orbit to 2nd orbit in Hiatom will be nearly 3300 A 6600 A 9900 A 11000A.

49. Problem 47 The number of a bonds in P4O10 is 6 16 20 7

50. Problem 48 Nernst equation is given by a. b. c. d.

51. Problem 49 Which one of the following ionic species will impancolour to an aqueous solution? Zn2+ Cu+ Ti4+ Cr3+

52. Problem 50 An organic compound containing C, H and N gave the following analysis C = 40%, H = 13.33%, N = 46.67% Its empirical formula would be CH4N CH5N C2HVN C2H7N

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