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A fresh set of 50 random questions is generated every time you open this page and every time you refresh it. The form will be autosubmitted at end of 60 minutes after page open/refresh. For each of the following multiple choice questions, choose the most appropriate answer : 1. The van't Hoff factor I for a compound which undergoes dissociation in one solvent and association in other solvent is respectively A. Greater than one and less than one B. Less than one and less than one C. Less than one and greater than one D. Greater than one and greater than one 2. For the reaction Fe2O3 + 3CO ¾® 2Fe + 3CO2 the volume of carbon monoxide required to reduce one mole of ferric oxide is A. 67.2 dm3 B. 44.8 dm3 C. 22.4 dm3 D. 11.2 dm3 3. An oxidizing agent is a substance A. Loses an electron in a redox chemical action B. Gains an electron in a redox chemical action C. Accelerates a redox chemical action D. Substitutes an electron in a redox chemical action 4. For transition metal octahedral complexes, the choice between high spin and low spin electronic configurations arises only for A. d1, d2 and d8 complexes B. d1 to d3 complexes C. d7 to d9 complexes D. d4 to d7 complexes 5. The wavelength of de-Broglie wave associated with it would be A. 6.63 ´ 10-37m B. 6.63 ´ 10-31m C. 6.63 ´ 10-34m D. 6.63 ´ 10-35m 6. Rate of chemical reaction is determined by A. Conductiometry B. Chelation C. Titration D. Spectrometry 7. 1 mole of Methane is A. 0.1 g B. 16 g C. 1 g D. 1.6 g 8. The pH of 10-8 M HCI solution is A. slightly more than 7 B. between 6 and 7 C. 8 D. more than 8 9. The letter 'D' in D - glucose signifies A. that it is a monosaccharide B. configuration at all chiral carbons C. configuration at a particular chiral carbon D. dextrorotatory 10. Which of these will have the least volume? A. HCl B. HBr C. HF D. HI 11. The volume of 10N and 4N HCl required to make 1 litre of 7N HCl are A. 0.50 litre of 10N HCl and 0.50 litre of 4N HCl B. 0.80 litre of 10N HCl and 0.20 litre of 4N HCl C. 0.75 litre of 10N HCl and 0.25 litre of 4N HCl D. 0.60 litre of 10N HCl and 0.40 litre of 4N HCl 12. When a mixture of calcium benzoate and calcium acetate is dry distilled, the resulting compound is A. acetophenone B. benzaldehyde C. acetaldehyde D. benzophenone 13. The gases that are not adsorbed are A. Ne and Xe B. He and Ne C. He and Xe D. Ar and Kr 14. By doing so it A. Increase the concentration of ions B. . Increases the solubility product of AgCl C. Decomposes Na2S and NaCN, if formed D. Helps in the precipitation of AgCl 15. Which one of the following is an example for homogeneous catalysis? A. Manufacture of sulphuric acid by contact process B. Hydrolysis of sucrose in presence of dilute hydrochloric acid C. Hydrogenation of oil D. Manufacture of ammonia by Haber's process 16. Gram molecular volume of oxygen at STP is A. 11200 cm3 B. 3200 cm3 C. 22400 cm3 D. 5600 cm3 17. At equilibrium, it was found that 60% of SO2 is used up. lf the partial pressure of the equilibrium mixture is one atmosphere. the partial pressure of O2 is A. 0.41 atm B. 0.21 atm C. 0.52 atm D. 0.82 atm 18. +I effect is shown by A. -N02 B. -Br C. -CH3 D. -Cl 19. Ketones are not prepared by A. Oxidation of secondary alcohols B. Hydrolysis of esters C. Oxidation of primary alcohols D. Oxidation of acids 20. If the total pressure of the mixture was found 1 atmosphere, the partial pressure of the nitrogen (N2) in the mixture is A. 0.9 atm B. 1 atm C. 0.5 atm D. 0.8 atm 21. m.s. velocity of molecules of a gas of density 4 kg m-3 and pressure 1.2 ´ 105 Nm-2 is A. 900 ms-1 B. 600 ms-1 C. 120 ms-1 D. 300 ms-1 22. Which is not the correct statement about RNA and DNA? A. DNA exists as dimer while RNA is usually single stranded B. RNA contains uracil in place of thymine (found in DN as a base C. DNA contains deoxyribose as its sugar and RNA contains ribose D. DNA is active in virus where RNA never appears in virus 23. Formation of coloured solution is possible when metal ion in the compound contains A. lone pair of electrons B. paired electrons C. unpaired electrons D. none of these 24. Which of the following is not nucleofile? A. Hydrogen peroxide B. Boron trifluoride C. Benzoyl chloride D. Hydrogen sulfide 25. If the for a given reaction has a negative value, then which of the following gives the correct relationships for the values of DG° and Keq? A. DGo > 0; Keq < 1 B. DGo > 0; Keq > 1 C. DGo < 0; Keq < 1 D. DGo < 0; Keq > 1 26. Which of the following compounds has the lowest melting point? A. CaCl2 B. CaBr2 C. CaI2 D. CaF2 27. Which one of the following does NOT involve coagulation? A. Formation of delta regions B. Peptization C. Treatment of drinking water by potash alum D. Clotting of blood by the use of ferric chloride 28. Benzaldehyde and acetone can be best distinguished using A. sodium hydroxide solution B. Fehling's solution C. 2, 4-DNPH D. Tollens' reagent 29. Amines behave as A. aprotic acid B. Lewis acids C. Lewis base D. neutral compound 30. Isotopes are atoms that contain A. Same number of protons but a different number of neutrons. B. Same number of protons and neutrons C. Different number of protons and neutrons D. Same number of neutrons but a different number of protons. 31. The compound which forms acetaldehyde when heated with dilute NaOH is A. 1, 1 Dichloro ethane B. 1, 1, 1 Trichloro ethane C. 1, 2 Dichloro ethane D. 1 Chloro ethane 32. Name the type of the structure of silicate in which one oxygen atom of [SiO4]4– is shared? A. Sheet silicate B. Three dimensional C. Linear chain silicate D. Pyrosilicate 33. 2 g of organic compound on Kjeldahilization liberates ammonia which consumes 30 cm3 of 1 N HCl. The percentage of nitrogen in the organic compound is A. 30 B. 46.67 C. 35 D. 20.8 34. The spin only magnetic moment of Fe2+ ion (in BM) is approximately A. 5 B. 7 C. 4 D. 6 35. Reaction of formaldehyde and ammonia gives A. Bakelite B. Urea C. Triethylene Tetramine D. Hexamethylene tetramine 36. The amount of the sample left behind on 1st March. 2009 (including both the days) A. 0.5 gm B. 0.125 gm C. 1 gm D. 0 gm 37. If at equilibrium the vessel has 1.5 moles of PCl5, the number of moles of PCl3 present in it is A. 4.5 B. 6 C. 3 D. 5 38. ln electrophillic aromatic substitution reaction, the nitro group is meta directing because it A. increases electron density at ortho and para positions B. decreases electron density at ortho and para positions C. decreases electron density at meta position D. increases electron density at meta position 39. Which is the most easily liquifiable rare gas? A. Kr B. Xe C. Ar D. Ne 40. How many molecules are present in one gram of water? A. 3.34 x 1022 B. 3.01 x 1023 C. 6.02 x 1023 D. 1.67 x 1022 41. 303 RT J mol–1. The ratio of rate constant to the Arrhenius factor is A. 0.001 B. 0.02 C. 0.1 D. 0.01 42. Which one of the following is a molecular crystal? A. Quartz B. Rock salt C. Dry ice D. Diamond 43. Its solubility product is A. 108y5 B. 36y4 C. 64y5 D. 6y4 44. The half life time of 1g sample of X is A. 30 min B. 15 min C. 7.5 min D. 22.5 min 45. The brown ring test for nitrates depends on A. oxidation of nitric oxide to nitrogen dioxide B. reduction of ferrous sulphate to iron C. oxidising action of sulphuric acid D. the reduction of nitrate to nitric oxide 46. In acetylene molecule, between the carbon atoms there are A. three pi bonds B. three sigma bonds C. one sigma and two pi bonds D. two sigma and one pi bonds 47. The compound which gives turbidity immediately with Lucas reagent at room temperature is A. butan-1-ol B. 2-methyl propan-1-ol C. butan-2-ol D. 2-methyl propan-2-ol 48. The organic compound may be A. Chloroform B. Methane C. Carbon tetrachloride D. Ethyl iodide 49. Which one is not a constituent of nucleic acid? A. Phosphoric acid B. Uracil C. Ribose sugar D. Guanidine 50. Maximum efficiency of a commercial refrigerator which operates between –10° (inside temperature) and 25°C (outside temperature) is A. 13.3% B. 11.45% C. 20% D. 24.75% | |