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1995 Chemistry
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(1) Aldehydes (2) Alcohols (3) Carboxylic acids (4) Primary amines. |
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| 2. | Proteins give purple colour when tested with: |
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(1)
Biuret (2) Benedict's reagent (3) Iodine solution (4) Ninhydrin reagent |
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| 3. | Heat of formula DHf0 of an explosive compound like NCl3 is: |
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(1) Positive or negative (2) Positive (3) Negative (4) Zero |
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| 4. | The organic compound used as antiknock agent in petroleum is: |
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(1) TNT (2) (C2H5)2Hg (3) (C2H5)4Pb (4) CH3MgBr |
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| 5. | Bordeaux used as fungicide in agriculture is a mixture of: |
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(1) CaO-CuO (2) CuSO4 + Ca(OH)2 (3) CuCO3.Cu(OH)2 (4) CaSO4+Cu(OH)2 |
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| 6. | Which of the following is not crystalline solid? |
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(1) Rhombic S (2) KCI (3) CsCI (4) Glass |
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| 7. | Solid iodine is: |
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(1) Metallic crystal
(2) Ionic crystal (3) Covalent crystal (4) Molecular crystal. |
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| 8. | The rate of chemical reaction is doubled for every 100C rise in temperature because of: |
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(1) Increase in the number of
activated molecules (2) Increase in the activation energy (3) Decrease in the activation energy (4) Increase in the number of molecular collisions. |
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| 9. | Aspirin is obtained by the reaction of salicylic acid with : |
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(1) Methanol (2) Acetic anhydride (3) Acetadehyde (4) Acetyl chloride |
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| 10. | Nitration of toluence using fuming sulphuric and nitric acids gives: |
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(1) Trinitro toluene (TNT) (2) o-nitro toluene (3) m-nitro toluene (4) p- nitro toluene |
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| 11. | Epsom salt is: |
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(1) Sodium bicarbonate (2) Hydrated calcium sulphate (3) Hydrated magnesium sulphate (4) Zinc sulphate |
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| 12. | Which of the following solutes will produce temporary hardness in water? |
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(1) NaHCO3 (2) MgCI2 (3) Mg(HCO3)2 (4) NaCI. |
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| 13. | Which form of carbon is good conductor? |
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(1) Amorphous (2) Diamond (3) Graphite (4) Coal. |
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| 14. | Nitrogen is obtained by the thermal decomposition of: |
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(1) AgNO3 (2) NH4NO3 (3) NH4NO2 (4) Pb(NO3)2 |
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| 15. | Which of the hydrohalic acid is inexpensive, strong and stable against oxidation? |
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(1) HI (2) HF (3) HCI (4) HBr |
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| 16. | The heat of neutralization is highest in the reaction between: |
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(1) NaOH-CH3COOH (2) HNO3NH4OH (3) HCI-NaOH (4) NH4OH-CH2COOH |
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| 17. | When k2Cr2O7 crystals are heated with concentrated HCI the gas evolved is: |
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(1) HCI (2) O2 (3) CI2 (4) CrO2CI2 |
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| 18. | The indicator used in the titration of Iodine against sodium thiosulphate is: |
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(1) Strach (2) KI (3) K2CrO4 (4) K3Fe(CN)6 |
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| 19. | Liquid petroleum Gas (LPG) mostly contains: |
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(1) propene (2) Methane (3) Ethane (4) Butane |
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| 20. | Coal is a mixture of: |
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(1) CH4 and CO (2) H2and CO (3) H2CO and CH4 (4) H2O and CO |
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| 21. | Which of the following set of quantum numbers is possible? |
| n l m1 m4 | |
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(1) 1
0 1 1/2 (2) 3 2 1 0 (3) 3 0 0 -1/2 (4) 1 2 2 1/2 |
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| 22. | Equivalent weight of KMnO4 is: |
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(1) One-sixth the molecular weight (2) Its molecular weight (3) One-fifth the molecular weight (4) Half the molecular weight |
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| 23. | Corrosion of iron can be prevented by coating the surface by: |
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(1) Any of the below (2) Zinc (3) Tin (4) Nickel |
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| 24. | Presence of halogens in organic compounds is detected by: |
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(1) Beilstein's test (2) Iodoform test (3) Silver nitrate test (4) Millon's test |
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| 25. | IUPAC name for anisole is: |
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(1) Methoxyethane (2) Methoxybenzene (3) Ethoxybenzene (4) Methoxymethane |
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| 26. | The gas evolved when Pb(NO3)2 is heated |
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(1) N2O5 (2) N2O (3) NO (4) NO2 |
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| 27 | Which of the following compounds is efflorescent ? |
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(1) NaHCO3 (2) Na2CO3 (3) Na2CO3.H2O (4) Na2CO310H2O |
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| 28. | The electronic configuration of Fe3+ ion is(at no. of Fe =26): |
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(1) [Ar]3d8 (2) Is22s22p63s2p63d5 (3) [Ar]3d64s2 (4) [Ar]3d64s1 |
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| 29. | The radioactive decay of an element is......... reaction |
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(1) Third order (2) Zero order (3) First order (4) second order |
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| 30. | Which of the following molecules is not linear? |
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(1) N2O (2) CO2 (3) C2H2 (4) NO2 |
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| 31. | 40 mg. of pure sodium hydroxide is dissolved in dissolved in 10 litres of distilled water. The pH of the solution is: |
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(1) 12 (2) 9 (3) 10 (4) 11 |
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| 32. | The pH of the solution produced when an aqueous solution of pH 5 is mixed with an equal volume of an aqueous solution of pH 3 is: |
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(1) 3.3 (2) 3.5 (3) 4.0 (4) 4.5 |
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| 33. | Pieric acid is: |
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(1) 1,3,4 trinitro phenol
(2) Trinitro because (3) Trinitro toluene (4) 2,4,6 trinitro phenol |
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| 34. | The standard enthalpy change of the decomposition of N2O4 to NO2 is 58.04 kJ and the standard entropy of this reaction is 176.7 J/K. Therefore the standard free energy change for this reaction at 250C is: |
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(1)
-539 kJ (2) -5.39 kj (3) 5.39 kJ (4) 539 kJ |
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| 35. | Which of the following is a closed system? |
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(1) Rocket engine during propulsion (2) Jet engine (3) Piece of rusting iron (4) Pressure cooker. |
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| 36 | Bell metal used to make big bells is an alloy of: |
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(1) Cu-Ni (2) Cu-A1 (3) Cu-Sn (4) Cu-Zn. |
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| 37. | Since the ionisation potential of the alkali metals is low, they are identified by flame test. The flame colour imparted by sodium is: |
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(1) Yellow (2) Red (3) Violet (4) Orange |
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| 38. | The metal ion present in insulin is: |
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(1) Zn2+ (2) Fe2+ (3) Fe3+ (4) Mg2+ |
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| 39. | Which of the following biomolecules contain a non-transition metal ion? |
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(1) Vitamin B12 (2) Haemoglobin (3) Chlorophyll (4) Insulin |
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| 40. | The functional group present in aldehydes is: |
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(1) -OH (2) C=O (3) -CHO (4) -COOH |
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| 41. | Volume of 0.6 M NaOH required to neutralize 30 cm3, of 0.4 M HCI is: |
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(1) 45 cm3 (2) 30 cm3 (3) 20 cm3 (4) 50 cm3 |
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| 42. | Hybridization of carbon is benzene molecule is: |
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(1) s2p (2) sp (3) sp2 (4) sp3 |
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| 43. | Which of the following organic compounds is aromatic? |
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(1) Benzene (2) Alkanes (3) Alkenes (4) Alkynes |
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| 44. | Among the halogens as you go from F to I, the electron affinity: |
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(1) Fluctuates (2) Increases (3) Decreases (4) Remains same |
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| 45. | Oxidation is removal of electrons. Therefore the strongest oxidiser by |
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(1) Iodine (2) Oxygen (3) Chlorine (4) Fluorine |
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| 46. | Enzymes are class of substances belonging to: |
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(1) Lipids (2) Monosaccharides (3) Nuclei acids (4) Proteins |
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| 47. | Which of the following statements is false? |
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(1) Hydrogen bonds are the only
force stabilizing the native structures of proteins (2) The alpha helix is a common feature of the primary structures of many proteins (3) Hydrogen bonds stabilize the alpha helix. (4) Hydrogen bonds stabilize the beta helix |
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| 48. | The vitamins present oils and fats are: |
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(1) B and C (2) A and B (3) A and C (4) A and D. |
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| 49. | The enzyme used in the conversion of glucose and fracture to ethyl alcohol is: |
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(1) Diatase (2) Zymase (3) maltase (4) Invertase. |
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| 50. | Grignard reagents are formed by the reaction of alkyl halides with: |
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(1) Warm MgCO3 (2) Mg ribbon in alcoholic solution (3) Warm MgCI2 (4) Warm Mg in the presence of dry ether |
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| 51. | The half-life period of a first order reaction is: |
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(1) Directly proportional to the
rate constant (2) Independent of the initial concentration (3) Dependent on the initial concentration (4) Dependent of the rate constant. |
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| 52. | Which of the following compounds undergoes Cannizzaro's reaction? |
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(1)
Benzyl alcohol (2) Acetone (3) Acetaldehyde (4) Formaldehyde |
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| 53. | The catalytic hydrogenation of benzene yields: |
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(1) Benzoic acid (2) Xylene (3) Cyclohexane (4) Toluene |
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| 54. | The base present in DNA but found in RNA is: |
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(1) Guanine (2) Thymine (3) Uracil (4) Adenine |
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| 55. | Copper pyrite, the chief ore of copper, is: |
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(1) Cu2O (2) Cu2S (3) CuCO3Cu(OH)2 (4) CuFeS2 |
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| 56. | Which of the following is not a co-ordination compound? |
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(1) Potassium ferricyanide (2) Potash alum (3) Potassium ferrocyanide (4) Cuprammonium sulphate |
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| 57. | The number of ions in tetra-amine copper (II) hydroxide is: |
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(1) Seven (2) Two (3) Three (4) Four |
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| 58. | Copper metal crystallizes with a face centered cubic (FCC) lattice. It has a co-ordination number of: |
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(1) 8 (2) 4 (3) 12 (4) 6 |
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| 59. | Nitrogen can have oxidation numbers -3 to + 5, Identify the compound have nitrogen in +1 state: |
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(1) N2O5 (2) N2 (3) NO (4) N2O |
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| 60. | The nitrogen fertilizer having the lowest nitrogen percentage is: |
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(1) Urea
(2) Ammonium nitrate (3) Ammonium sulphate (4) Calcium ammonium nitrate |
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| 61. | Alkynes are represented by the general formula: |
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(1) CnH2n-2 (2) CnH2n (3) CnH2n+2 (4) CnH2n+4 |
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| 62. | Identify the reaction which is not affected by increase in pressure: |
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(1) 2SO2 + O2 « 2SO3 (2) PCI3 + CI2 « PCI5 (3) N2 + 3H2 « 2NH3 (4) N2 + O2 « 2NO |
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| 63. | For an exothermic reaction: |
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(1) DE is negative
(2) DH is positive (3) DH is negative (4) DH is equal to zero. |
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| 64. | In the manufacture of ammonia by Haber's process N2 + 3H2 « 2NH3,DH =-92.3kJ which of the following conditions is unfavourable ? |
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(1) Removing ammonia as it is formed
(2) Increasing temperature (3) Increasing pressure (4) Reducing temperature |
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| 65. | The catalyst used is the manufacture of nitric acid by Ostwald's process is: |
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(1) Fe (2) Rh (3) Pt-RH (4) Pd. |
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| 66. | In the process of nitration the electrophile formed is: |
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(1) NO+ (2) NO+2 (3) NO-2 (4) NO-3 |
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| 67. | Maleic and fumaric acids are: |
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(1) Chain isomers (2) Optical isomers (3) Geometric isomers (4) Functional isomers |
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| 68. | Prussian blue is: |
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(1) Fe4[Fe11(CN)6]3 (2) K4[Fe(CN)6] (3) CU2[Fe(CN)6] (4) Fe3[Fe111(CN)6]2 |
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| 69. | In the reaction C2H2(g)+5/202(g)®2 CO2(g)+H2O(l) the heat evolved 1300.00 kJ mol-1, DH0fCO2(g)=-393.7 kJ mol-1, DH0fHO2(g)=-285.85 kJ mol-1 therefore the heat of formation of acetylene is: |
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(1) + 1,802 kJ mol-1 (2) + 226.8 kJ mol-1 (3) - 226.8 kJ mol-1 (4) - 1,802 kJ mol-1 |
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| 70. | Which of the following statements about the catalysts is not true? |
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(1) Catalytic property of
heterogeneous catalyst depends on the surface area of the catalyst (2) A catalyst cannot alter a reaction mechanism (3) A catalyst lowers the free energy of activation (4) A catalyst altered in one step is restored in subsequent steps. |
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| 71. | The relative strengths of hydrophalic acids are in the order: |
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(1) HCI > HBr > HI (2) HI > HBr > HCI (3) HBr > HCI > HI (4) HI > HCI > HBr |
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| 72. | An aqueous solution of Al(NO3)3 gives a white gelatinous precipitate with the addition of small amount of NaOH which dissolves with excess NaOH solution. The complex formed is: |
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(1) Al(OH)3 (2) NaAl(OH3)4 (3) NaAlO2 (4) NaAl(OH)4 |
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| 73. | The cell used for the electrolysis of fused NaCI is: |
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(1) Castner cell (2) Solvay cell (3) Nelson cell (4) Down's cell |
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| 74. | Sodium is preserved under: |
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(1) Water (2) Kerosene (3) Methanol (4) Ether |
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| 75. | Molten sodium used in nuclear reactors: |
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(1) Absorbs fission products. (2) Acts as moderator by slowing down the fast neutrons, (3) Absorbs neutrons to control the chain reaction. (4) Acts as a coolant. |
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