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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 one which has least Iodine value is A. Ginger oil B. Sunflower oil C. Ghee D. Groundnut oil 2. The ozone layer forms naturally by A. the interaction of oxygen and water vapour B. the interaction of UV radiation with oxygen C. the interaction of IR radiation with oxygen D. the interaction of CFC with oxygen 3. Mg+2 is isoelectronic with A. Zn2+ B. Cu2+ C. Na+ D. Ca2+ 4. In which of the following process, a maximum increase in entropy is observed? A. sublimation of naphthalene B. melting of ice C. condensation of water D. dissolution of salt in water 5. Fraction of total pressure exerted by methane is A. 1/9 B. 1/3 C. 8/9 D. 1/2 6. The maximum number of possible isomers in 1-bromo-2-methyl cyclobutane is A. 2 B. 4 C. 16 D. 8 7. The complex, [Pt (Py) (lNH3) Br Cl ] will have how many geometrical isomers? A. 3 B. 4 C. 0 D. 2 8. 5 mole of each of H2, SO2 and CH4 are kept in a container. A hole was made in the container. After 3 hours, the order of partial pressures in the container will be A. pH2 > pCH4 > pSO2 B. pH2 > pSO2 > pCH4 C. pSO2 > pCH4, > pH2 D. pSO2 > pH2 > pCH4 9. A complex compound in which the oxidation number of a metal is zero is A. [Ni (CO)4] B. K3 [Fe (CN)6] C. [Pl (NH3 )4]Cl2 D. K4 [Fe (CN)6] 10. When compared to DG0 for the formation of Al2O3 , the AG0 for the formation of Cr2O3 is A. unpredicted B. same C. lower D. higher 11. The normality of 30 volume H2O2 is A. 6.685 N B. 2.678 N C. 8.034 N D. 5.336 N 12. 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 13. 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 14. An example for autocatalysis is A. oxidation of NO to NO2 B. oxidation of oxalic acid by acidified KMnO4 C. decomposition of KClO3 to KCl and O2 D. oxidation of SO2 to SO3 15. 1 M with respect to Ag+, Ca2+, Mg2+ and AI3+ which will precipitate at lowest concentration of [] when solution of Na3PO4 is added? A. Ag3PO4(Ksp = 1 × 10–6) B. AIPO4(Ksp = 1 × 10–20) C. Ca3(PO4)2(Ksp = 1 × 10–33) D. Mg3(PO4)2(Ksp = 1 × 10–24) 16. The edge length of NaCl unit cell is A. 276 pm B. 138 pm C. 415 pm D. 552 pm 17. Alkanes are also known as A. All of these B. Saturated hydrocarbons C. Paraffins D. None of these 18. The total number of atomic orbitals in fourth energy level of an atom is A. 32 B. 16 C. 8 D. 4 19. The number of disulphide linkages present in insulin are A. 1 B. 2 C. 4 D. 3 20. Identify the ore not containing iron A. siderite B. chalcopyrites C. limonite D. carnallite 21. Inductive effect involves A. delocalisation of p electrons B. displacement of p electrons C. delocalisation of s electrons D. displacement of s electrons 22. 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 23. Which one of the following will exhibit minimum paramagnetic behaviour? At. nos. Cr = 24, Mn = 25, Fe = 26, Co = 27 A. [Mn(H2O)6]2+ B. [Co(H2O)6]2+ C. [Fe(H2O)6]2+ D. [Cr(H2O)6]2+ 24. The incorrect statement in respect of Chromyl chloride test is A. liberation of Chlorine B. formation of red vapours C. formation of Chromyl chloride D. formation of lead chromate 25. Paracetamol is a/ an A. antimalarial B. antipyretic C. analgesic D. antimalarial and analgesic 26. By what factors does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled? A. 4.0 B. 2.0 C. 1.4 D. 2.8 27. 1 N aci The percentage of nitrogen in the food is A. 8.4 B. 16.8 C. 0.84 D. 1.68 28. The highest magnetic moment is shown by the transition metal ion with the configuration A. 3d9 B. 3d2 C. 3d5 D. 3d7 29. Helium is used in balloons in place of hydrogen because it is A. radioactive B. lighter than hydrogen C. incombustible D. more abundant than hydrogen 30. The reagent with which both acetaldehyde and acetone react is A. Fehling's reaction B. I2/NaOH C. Carbonic acid D. Tollen's reagent 31. The number of naturally occurring p-block elements that are diamagnetic is A. 7 B. 18 C. 6 D. 5 32. 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 33. 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 34. The typical range of molar enthalpies for the strongest intermolecular (Hydrogen) bonds is A. 4 – 25 kJ B. 300 – 500 kJ C. 200 – 300 kJ D. 4 – 25 J 35. The compound which is not founded during the dry distillation of a mixture of calcium format and calcium acetate is A. Ethanal B. Propanal C. Methanal D. Propanone 36. Which complex can not ionise in solution? A. K4[Fe(CN)6] B. [CoCl3(NH3)3] C. K2[pt(F6)] D. [Pt(NH3)6] Cl4 37. One mole of oxygen at 273 k and one mole of sulphur dioxide at 546 k are taken in two separate containers, then, A. kinetic energy of both are equal. B. kinetic energy of O2 < kinetic energy of SO2. C. kinetic energy of O2 > kinetic energy of SO2 . D. None of these 38. According to Bayer's strain theory which is highly stable? A. cyclobutane B. cyclopentane C. cycloheptane D. cyclohexane 39. If one mole of ammonia and one mole of hydrogen chloride are mixed in a closed container to form ammonium chloride gas, then A. there is no relationship B. DH < Du C. DH > Du D. DH = Du 40. Which of the following has the maximum number of unpaired 'd' electrons? A. Zn2+ B. Ni3+ C. Fe2+ D. Cu+ 41. Chemical reactions with very high Ea values are generally A. very fast B. moderately fast C. very slow D. spontaneous 42. An organic compound which produces a bluish green coloured flame on heating in presence of copper is A. chlorobenzene B. benzoic acid C. aniline D. benzaldehyde 43. The reason for this anomalous behaviour is that graphite A. has carbon atoms arranged in large plates of rings of strongly bound carbon atoms with weak interplate bonds. B. is a non-crystalline substance. C. is an allotropic form of carbon. D. has molecules of variable molecular masses like polymers. 44. The spin only magnetic moment of Mn+4 ion is nearly A. 3 BM B. 4 BM C. 5 BM D. 6 BM 45. 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 46. Methoxy methane and ethanol are A. Optical isomers B. Functional isomers C. Position isomers D. Chain isomers 47. For alkali metals, which one of the following trends is INCORRECT? A. Density: Li < Na < K < Rb B. Hydration energy: Li > Na > K > Rb C. Ionization energy: Li > Na > K > Rb D. Atomic size: Li < Na < K < Rb 48. 59 V. The equilibrium constant for the reaction of the cell is A. 1020 B. 1025 C. 1015 D. l030 49. 44 g is treated with sodium carbonate solution to precipitate all the calcium ions as calcium carbonate. The calcium carbonate so obtained is heated strongly to get 0.56 g of CaO. The percentage of NaCl in the mixture is [Atomic mass of Ca = 40] A. 25 B. 75 C. 31.5 D. 40.2 50. In which of the following complex ion, the central metal ion is in a state of sp3d2 hybridisation? A. [CoF6]3- B. [Fe(CN)6]3- C. [Co(NH3)6]3+ D. [Cr (NH3)6]3+ | |