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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. 2 N HCI is titrated against 0.1 N NaOH solution. The titration is discontinued after adding 50 cm3 of NaOH. The remaining titration is completed by adding 0.5 N KOH. The volume of KOH required for completing the titration is A. 10 cm3 B. 25 cm3 C. 10.5 cm3 D. 12 cm3 2. The organic compound may be A. Chloroform B. Methane C. Carbon tetrachloride D. Ethyl iodide 3. The monomers of Buna-S rubber are A. vinyl chloride and sulphur B. butadiene C. styrene and butadiene D. isoprene and butadiene 4. The reagent with which both acetaldehyde and acetone react is A. Fehling's reaction B. I2/NaOH C. Carbonic acid D. Tollen's reagent 5. Which of the following is used to prepare Cl2 gas at room temperature from concentrated HCI? A. MnO2 B. KMnO4 C. Cr2O3 D. H2S 6. Which of the following is an intensive property? A. temperature B. surface tension C. viscosity D. All of these 7. Which one of the following conformations of cyclohexane is the least stable? A. Half-chair B. Twisted-boat C. Boat D. Chair 8. Which of the following pairs of metals is purified by van Arkel method? A. Ga and In B. Ni and Fe C. Ag and Au D. Zr and Ti 9. The oxide of an element whose electronic configuration is ls2 2s2 2p6 3s1 is A. Basic B. Neutral C. Acidic D. Amphoteric 10. Which one of the following is a covalent crystal? A. Quartz B. Rock salt C. Dry ice D. Ice 11. 59 V. The equilibrium constant for the reaction of the cell is A. 1020 B. 1025 C. 1015 D. l030 12. Argon is used A. in radiotherapy for treatment of cancer B. in high temperature welding C. in filling airships D. to obtain low temperature 13. According to Bayer's strain theory which is highly stable? A. cyclobutane B. cyclopentane C. cycloheptane D. cyclohexane 14. Its solubility product is A. 108y5 B. 36y4 C. 64y5 D. 6y4 15. 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 16. The number of neutrons in the nucleus of the product will be A. X – 4 – Y B. X – Y – 5 C. X – Y – 6 D. X – Y – 3 17. For one mole of an ideal gas, increasing the temperature from 10°C to 20°C A. increases the average kinetic energy by two times. B. increases the rms velocity by times. C. increases both the average kinetic energy and rms velocity, but not significantly. D. increases the rms velocity by two times. 18. pH value of which one of the following is NOT equal to one? A. 0.1 M HNO3 B. 0.1 M CH3 COOH C. 50 cm3 0.4 M HCl + 50 cm3 0.2 M NaOH D. 0.05 M H2SO4 19. The set of quantum numbers for the outermost electron for copper in its ground state is A. 4, 2, 2, +½ B. 4, 0, 0, +½ C. 3, 2, 2, +½ D. 4, 1, 1, +½ 20. 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% 21. 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 22. Gram molecular volume of oxygen at STP is A. 11200 cm3 B. 3200 cm3 C. 22400 cm3 D. 5600 cm3 23. Which of the following forms a colour less solution in aqueous medium? A. Cr 3+ B. Ti 3+ C. V 3+ D. Sc 3+ 24. 3 kJ/mol at its boiling point of 80°C. The entropy change in the transition of vapour to liquid at its boiling point is [in J mol–1 K–1] A. –342 B. +100 C. –100 D. +342 25. Its de Broglie wavelength is 6.62 ´ 10-35m. Hence x is (h = 6.62 ´ 10-34Js) A. 0.2 kg B. 0.15 kg C. 0.25 kg D. 0.1 kg 26. Its electonic configuration will be A. 1s22s22p63s23p3 B. 1s22s22p3 C. 1s22s22p63s23p2 D. 1s22s22p4 27. Presence of halogen in organic compounds can be detected using A. Leibig's test B. Duma's test C. Beilstien's test D. kjeldahl test 28. In chromite ore, the oxidation number iron and chromium are respectively A. +3, +6 B. +2, +3 C. +2, +6 D. +3, +2 29. Acrolcin test is positive for A. polysaccharides B. reducing sugars C. proteins D. oils and fats 30. 2 V, +0.5 V and –3.0 V respectively. The reducing power of these metals will be A. Z > X > Y B. X > Y > Z C. Y > Z > X D. Y > X > Z 31. Methyl bromide is converted into ethane by heating it in ether medium with A. Zn B. Na C. Cu D. Al 32. The number of disulphide linkages present in insulin are A. 1 B. 2 C. 4 D. 3 33. The colour of sky is due to A. wavelength of scattered light B. absorption of light by atmospheric gases C. transmission of light D. All of these 34. The general formula of a cycloalkane is A. CnH2n + 2 B. CnH2n C. CnH2n - 2 D. CnHn 35. Which one of the following is wrongly matched? A. [Cu (NH3 )4]+2 - square planar B. [Co (en )3 ]+3 - follows EAN rule C. [Fe (CN )6]-3 - sp3d2 D. [Ni(CO)4] - neutral ligand 36. Hence, the binary solution shows A. no deviation from Raoult's law B. positive deviation from Raoult's law C. positive or negative deviation from Raoult's law depending upon the composition D. negative deviation from Raoult's law 37. 023 g of sodium metal is reacted with 100 cm3 of water. The pH of the resulting solution is A. 12 B. 8 C. 9 D. 10 38. 2 dm3 of CO2 gas at STP. The mass of KOH required to completely neutralise the gas is A. 42 g B. 56 g C. 20 g D. 28 g 39. 1 M HCl is mixed with 200 cm3 of 0.2 M NaoH is A. 2.292 kJ B. 1.292 kJ C. 0.292 kJ D. 22.9 kJ 40. Hybridization of C2 and C3 of H3C – CH = C = CH – CH3 are A. Sp2, Sp B. Sp, Sp C. Sp2, Sp2 D. Sp, Sp3 41. If the enthalpy change for the transition of liquid water to steam is 30 kJ mol–1 at 27°C, the entropy change for the process would be A. 0.1 J mol–1 K–1 B. 100 J mol–1 K–1 C. 1.0 J mol–1 K–1 D. 10 J mol–1 K–1 42. equilibrium is shifted to the leftCORRECT A. equilibrium is shifted to the right B. C. equilibrium is unaltered D. reaction rate does not change 43. Which of the following gives an aldehyde on dry distillation? A. Calcium benzoate B. Calcium acetate C. Calcium formate + calcium acetate D. Calcium acetate + calcium benzoate 44. In an alkaline medium, glycine predominantly exists as/in a /an A. zwitterions B. covalent form C. cation D. anion 45. Excess of PCl5 reacts with con H2SO4 giving A. sulphurous acid B. thionyl chloride C. chlorosulphonic acid D. sulphuryl chloride 46. The reaction is called A. Etard's reaction B. Wurtz's reaction C. Fittig's reaction D. Williamson's reaction 47. The pH of the resulting solution is A. 2 B. 8 C. 1 D. 3 48. Which metal has a greater tendency to form metal oxide? A. Ca B. Fe C. Cr D. Al 49. Inductive effect involves A. delocalisation of p electrons B. displacement of p electrons C. delocalisation of s electrons D. displacement of s electrons 50. 65 coulombs of electric current is passed through fused anhydrous MgCl2. The magnesium metal thus obtained is completely converted into a Grignard reagent. The number of moles of Grignard reagent obtained is A. 5 ´ 10–4 B. 1 ´ 10–4 C. 1 ´ 10–5 D. 5 ´ 10–5 | |