AFMC Chemistry 2005

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AFMC Chemistry 2005

  1. 1. AFMC–Past papers<br />CHEMISTRY - UNSOLVED PAPER - 2005<br />
  2. 2. SECTION – I (Total Marks :50)<br />Single Correct Answer Type<br />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<br />
  3. 3. 01<br />Problem<br />Which of the following is an inert gas?<br />H2<br />O3<br />N2<br />argon<br />
  4. 4. Problem<br />02<br />If 0.1 M of a weak acid is taken, and its percentage of degree of ionization is 1.34%, then calculate its ionization constant.<br />0.8 x 10-5<br />1.79 x 10-5<br />0.182 x 10-5<br />none of these<br />
  5. 5. Problem<br />03<br />If a substance with half life 3 days is taken at other place in 12 days. What amount of substance is left now?<br />1/4 <br />1/8<br />1/16 <br />1/32<br />
  6. 6. Problem<br />04<br />To prepare a solution of concentration of 0.03 g/ml of AgNO3 , what amount of AgNO3 should be added in 60 ml of solution?<br />1.8 <br />0.8<br />0.18 <br />none of these<br />
  7. 7. Problem<br />05<br />How will you separate a solution (miscible) of benzene + CHC13?<br />sublimation <br />filtration<br />distillation <br />crystallisation<br />
  8. 8. Problem<br />06<br />When alcohol reacts with concentrated H2SO4 intermediate compound formed is<br />carbonium ion <br />alkoxy ion<br />alkyl hydrogen sulphate<br />none of these<br />
  9. 9. Problem<br />07<br />According to law of mass action rate of a chemical reaction is proportional to<br />concentration of reactants<br />molar concentration of reactants<br />concentration of products<br />molar concentration of products<br />
  10. 10. Problem<br />08<br />In Hall's process, the main reagent is mixed with<br />NaF<br />Na3AIF6<br />AlF3<br />none of these<br />
  11. 11. Problem<br />09<br />In electrolysis of dilute H2SO4 , what is liberated at anode?<br />H2<br />SO4<br />SO2<br />O2<br />
  12. 12. Problem<br />10<br />A gas can be liquefied<br />above its critical temperature<br />at its critical temperature<br />below its critical temperature<br />at any temperature<br />
  13. 13. Problem<br />11<br />Which of the following is hypnotic?<br />acetaldehyde <br />paraldehyde<br />metaldehyde<br />none of these<br />
  14. 14. Problem<br />12<br />By which of the following process permanent hardness of water can be removed?<br />soda lime <br />sodium bicarbonate<br />washing soda <br />sodium chloride<br />
  15. 15. Problem<br />13<br />Vinegar obtained from sugarcane has<br />CH3COOH <br />HCOOH<br />C6H5COOH <br />CH3CH2COOH<br />
  16. 16. Problem<br />14<br />What is the packet of energy called?<br />electron <br />photon<br />positron <br />proton<br />
  17. 17. Problem<br />15<br />When an acid cell is charged, then<br />voltage of cell increases<br />electrolyte of cell dilutes<br />resistance of cell increases<br />none of these<br />
  18. 18. Problem<br />16<br />NaOH is prepared by the method<br />Down's cell <br />Castner cell<br />Solvay process <br />CastnerKellner cell<br />
  19. 19. Problem<br />17<br />When toluene is treated with KMnO4, what is produced?<br />benzene <br />chlorobenzene<br />benzaldehyde<br />benzoic acid<br />
  20. 20. Problem<br />18<br />Solder is an alloy of<br />70% lead, 30% tin<br />30% lead, 70% tin<br />80% lead, 20% tin<br /> 90% Cu, 10% tin<br />
  21. 21. Problem<br />19<br />Carbolic acid is<br />C6H5CHO <br />C6H6<br />C6H5COOH <br />C6H5OH<br />
  22. 22. Problem<br />20<br />Alcohols are isomeric with<br />acids <br />ethers<br />esters <br />aldehydes<br />
  23. 23. Problem<br />21<br />The group linkage present in fats is<br />peptide linkage <br />ester linkage<br />glycosidic linkage<br />none of these<br />
  24. 24. Problem<br />22<br />The group present in waxes are<br />Acid group <br />Ester group<br />Alcohol group <br />Ether group<br />
  25. 25. Problem<br />23<br />Which of the following is liquid at room temperature?<br />CH3I <br />CH3Br<br />C2H5C1 <br />CH3F<br />
  26. 26. Problem<br />24<br />Which gas is liberated when AI4C3 is hydrolysed?<br />CH4<br />C2H2<br />C2H6<br />CO2<br />
  27. 27. Problem<br />25<br />The only alcohol that can be prepared by the indirect hydration of alkene is<br />Ethyl alcohol <br />Propyl alcohol<br />Isobutyl alcohol <br />Methyl alcohol<br />
  28. 28. Problem<br />26<br />Baking powder is<br />NaHCO3<br />NaHCO3-6H2O<br />Na2CO3<br />Na2CO3- 10H2O<br />
  29. 29. Problem<br />27<br />When washing soda is heated<br />CO is released <br />CO + CO2 is released<br />CO2 is released<br />Water vapour is released<br />
  30. 30. Problem<br />28<br />Which of the following attacks glass?<br />HC1 <br />HF<br />HI<br />HBr<br />
  31. 31. Problem<br />29<br />A colourless gas with the smell of rotten fish is<br />H2S <br />PH3<br />SO2<br />None of these<br />
  32. 32. Problem<br />30<br />Salicylic acid is prepared from phenol by<br />Reimer Tiemann reaction<br />Kolbe's reaction<br />Kolbe-electrolysis reaction<br />None of these<br />
  33. 33. Problem<br />31<br />Lucas test is done for<br />Alkyl halides <br />Alcohols<br />Acids<br />Aldehydes<br />
  34. 34. Problem<br />32<br />Hydrogen can be fused to form helium at<br />High temperature and high pressure<br />High temperature and low pressure<br />Low temperature and high piessure<br />Low temperature and low pressure<br />
  35. 35. Problem<br />33<br />When CO2 is bubbled through a solution of barium peroxide in water<br />O2 is released<br />Carbonic acid is formed<br />H2O2 is formed <br />No reaction occurs<br />
  36. 36. Problem<br />34<br />The most important ore of tin is<br />Cassiterite<br />Cryolite<br />Cerussite<br />None of these<br />
  37. 37. Problem<br />35<br />Heating of ore in presence of air to remove sulphur impurities is called<br />Calcination<br />Roasting<br />Smelting<br />None of these<br />
  38. 38. Problem<br />36<br />CaCO3 CaO + CO2 reaction in a line goes to completion because<br />CaO does not react to CO2 to give CaCO3<br />Backward reaction is very slow<br />CO2 formed escapes out<br />None of these<br />
  39. 39. Problem<br />37<br />If 30 ml of H2 and 20 ml of O2 reacts to form water, what is left at the end of the reaction?<br />10 ml of H2<br />5 ml of H2<br />10 ml of O2<br />5 ml of O2<br />
  40. 40. Problem<br />38<br />Which of the following is a highly corrosive salt?<br />FeCl2<br />PbCl2<br />Hg2Cl2<br />HgCl2<br />
  41. 41. Problem<br />39<br />0.5 M of H2SO4 is diluted from 1 litre to 10 litre, normality of resulting solution is<br />1 N <br />0.1 N<br />10 N <br />11 N<br />
  42. 42. Problem<br />40<br />Formula for tear gas is<br />COCl2<br />CCI3NO2<br />N2O<br />None of these<br />
  43. 43. Problem<br />41<br /> Which of the following is potassium ferricyanide?<br />K4[Fe(CN)6]<br />K3[Fe(CN)6]<br />K3[Fe(CN)3] <br />K3[Fe(CN)4]<br />
  44. 44. Problem<br />42<br />Sodium nitroprusside when added to an alkaline solution of supplied ions produce a<br />Red coloration <br />Blue coloration<br />Purple coloration<br />Brown coloration<br />
  45. 45. Problem<br />43<br />The product obtained on reaction of C2H5C1 with hydrogen over palladium carbon is<br />C3H8<br />C4H10<br />C2H6<br />C2H4<br />
  46. 46. Problem<br />44<br />A solution has pH = 5, it is diluted 100 times, then it will become<br />Neutral <br />Basic<br />Unaffected <br />More acidic<br />
  47. 47. Problem<br />45<br />Ketones react with Mg-Hg over water gives<br />Pinacolone<br />Pinacols<br />Alcohols <br />None of these<br />
  48. 48. Problem<br />46<br />X is heated with soda lime and gives ethane. X is<br />Ethanoic acid <br />Methanoic acid<br />Propanoic acid <br />Either (a) or (c)<br />
  49. 49. Problem<br />47<br />Which is used to produce smoke screens?<br />Calcium phosphide<br />Zinc sulphide<br />Sodium carbonate <br />Zinc phosphide<br />
  50. 50. Problem<br />48<br />The conversion of maltose to glucose is possible by the enzyme<br />Zymase<br />Lactase<br />Maltase<br />Diastase<br />
  51. 51. Problem<br />49<br />The product obtained on fusion of BaS04 and Na2CO3 is<br />BaCG3<br />BaO<br />Ba(OH)2<br />BaHSO4<br />
  52. 52. Problem<br />50<br />A 5 molar solution of H2SO4 is diluted from 1 litre to 10 litres. What is the normality of the solution?<br />0.25 N <br />1 N<br />2 N <br />7 N<br />
  53. 53. For solution visit www.vasista.net<br />

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