GSHSEB - CHEMISTRY
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1 GSHSEB - CHEMISTRY Section - A - Solution 1. Which of the following compound has the highest acidic strength? (a) p-nitro benzoic acid (b) o-nitro benzoic acid (c) p-methyl benzoic acid (d) Benzoic acid 2. Which of the following diazonium salt is stable at room temperature? (a) C6H5N2 + BF4 - (b) C6H5N2 + HSO4 - (c) C6H5N2 + Cl - (d) p-methyl C6H5N2 + Cl - 3. Which of the following reaction gives secondary amine? (a) Hoffman reduction (b) Reduction of nitro compound (c) Reduction of crabyl amine (d) Reduction of amide 4. What is the final product obtained in the reaction between ethane nitrile and ethyl magnesium bromide? (a) Pent-2-one (b) Butan-2-one (c) Butanamine (d) Methoxy propane 5. Give the correct order of proportions of products obtained by nitration of aniline. (a) p-nitro aniline > m-nitro aniline > o-nitro aniline (b) m-nitro aniline > o-nitro aniline > p-nitro aniline (c) o-nitro aniline > p-nitro aniline > m-nitro aniline (d) m-nitro aniline > p-nitro aniline > o-nitro aniline
2 6. Which of the following amino acid is neutral? (a) Arginine (b) Lysine (c) Glycine (d) Aspartic acid 7. Which of the following disease is caused by the deficiency of α - tocopherol? (a) Beri-beri (b) Bone deformation (c) Scurvey (d) Sterility 8. Which glycosidic linkage is present in maltose? (a) ß - D - (+) - glucose (C1) - O - (C4) - D - (-) - glucose (b) α - D - (+) - glucose (C1) - O - (C4) - D - (+) - glucose (c) ß - D - (+) - glucose (C1) - O - (C4) - D - (+) - glucose (d) α - D - (+) - glucose (C1) - O - (C2) - ß - D - (-) - glucose 9. Which monomer is responsible for flexibility property in PHBV? (a) HO - CH - CH2 - CHO CH2 - CH3 (b) HO - CH - CH2 - CH2 - COOH CH3 (c) HO - CH - CH2 - COOH CH2 - CH3 (d) HO - CH - CH2 - COOH CH3 10. Which of the polymer is not a homo-polymer? (a) Nitrile rubber (b) Natural rubber (c) Neoprene (d) Butyl rubber Ans: (a) 11. Which of the following is used as a food preservative? (a) ascorbic acid (b) salts of sorbic acid (c) Sucralose (d) Citric acid 12. Which of the following solution is used as a washing solution for eyes to free them from microorganisms? (a) Dilute aqueous solution of Boric acid
3 (b) 0.2% Phenol solution (c) 2-3% Iodine solution (d) 1% Phenol solution 13. What is the number of atoms in end centered unit cell? (a) 6 (b) 1 (c) 4 (d) Which of the following ion is paramagnetic? (a) Cr 3+ (b) O2 2- (c) Zn 2+ (d) Cu A compound is formed of two elements A and B. The atoms of element A forms face centered cubic closed packing and atoms of element B occupies all the tetrahedral voids. What will be the formula of the compound? (a) A2B (b) AB8 (c) AB2 (d) A4B 16. An element possess cubic closed structure. Calculate the radius (r) of the atom in the unit cell. (Edge length of the unit cell, a = 252 nm) (a) nm (b) nm (c) 152 nm (d) 126 nm 17. Which of the following aqueous solution has the highest boiling point having concentration of 0.50 m? (a) Na2SO4 (b) Urea (c) NaCl (d) K3[Fe(CN)6] 18. What is the concentration solution in ppm when 5.0 x 10-5 g CO2 is dissolves in 100 ml solution? (a) 5.0 x 10-5 (b) 0.5 (c) 500 (d) Which of the following is an example for interstitial solid solution? (a) Al4C3 (b) Li2C2 (c) TiC
4 (d) SiC 20. Which gas is evolved at the anode during the electrolysis of KHF2 in anhydrous HF? (a) H2 and O2 (b) O2 (c) H2 (d) F2 21. The electronic conductivity does not depend on; (a) The number of electrons in the valence shell of atoms of metal (b) The size of ions produced and their hydration (c) The nature of the solvent and their viscosity (d) Nature of the added electrolyte 22. If one mole electrons are passed through solutions of CuSO4, AgNO3 and FeCl3,what will be the mole ratios of metals Cu, Ag and Fe deposited at the electrodes? (a) 2 : 6 : 3 (b) 2 : 1 : 3 (c) 3 : 6 : 2 (d) 1 : 2 : The limiting molar conductivity and molar conductivity of acetic acid are S.cm 2.mol S.cm 2.mol -1 respectively. Calculate the degree of dissociation of weak acid. (a) (b) (c) (d) Which method is used in the refining of Titanium metal? (a) Van Arkel (b) Frasch (c) Mond carbonyl (d) Zone Refining 25. Which of the following two substances react to form blister copper? (a) Cu2S and FeS2 (b) Cu2S and O2 (c) Cu2O and FeS (d) Cu2S and Cu2O 26. What is the formula of Marshall s acid? (a) H2S2O7 (b) H2SO4 (c) H2S2O8 (d) H2SO5 27. Which of the following is the correct order of basicity of hydride compounds? (a) SbH3 < PH3 < AsH3 < NH3
5 (b) SbH3 < AsH3 < PH3 < NH3 (c) PH3 < AsH3 < NH3 < SbH3 (d) NH3 < PH3 < AsH3 < SbH3 28. Which among the following Halic (II) acid can be formed? (a) HIO2 (b) HFO2 (c) HBrO2 (d) HClO2 29. How many Ó and π bonds are present in the structure of DDT? (a) 29, 6 (b) 20, 6 (c) 17, 6 (d) 21, Which substance is used to extinguish fire in substances like oil, fat and petrol? (a) CCl4 (b) CH2Cl2 (c) CHCl3 (d) CH3Cl 31. Which of the following compound is optically inactive? (a) Glucose (b) Lactic acid (c) Glyceraldehyde (d) Propionic acid 32. Name the product obtained in the following reaction. CH3 - CH2 - CH2 - CH = CH2 (a) 2 Methyl - butan ol (b) Pentan ol (c) Pentan ol (d) Pentan ol Ans; (d) 33. Give the IUPAC name of the product obtained when phenol is oxidised by chromic acid. (a) Cyclohexa - 1,4 - diene - 2, 5 - dione (b) Cyclohexa - 1, 4 dione (c) Cyclohexa - 2, 5 diene - 1, 4 - dione (d) Cyclohexanone 34. Identify the perineum chloro chromate from the following. (a) (b) (c)
6 (d) 35. For the reaction 2A + B product, -d[a]/dt = K[A] 2 [B]. What will be the rate equation for - d[b]/dt? (a) K [A] [B] 1/2 (b) K [2A] 2 [B] (c) K [A] [B] 2 (d) 1/2 K [A] 2 [B] 36. For a reaction, the value of slope of the plot in ln K 1/T = (a) -Ea / R (b) -Ea / (c) -Ea (d) -Ea / R 37. Which of the following relation is correct for zero order reaction? (a) t1/2 is independent of [R]0 (b) t1/2 1 / [R]0 (c) t1/2 1 / [R]0 2 (d) t1/2 [R]0 38. Which equation of Langmuir adsorption isothermal apply at high pressure? (a) x/m = a/b (b) x/m = a.p (c) x/m = 1/a.p (d) x/m = b/a 39. Which of the following will form a reversible sol? (a) Arsenious sulphide sol (b) Rubber sol (c) Sulphur sol (d) Gold sol 40. Which of the following gases can be absorbed in more proportions? (a) H2 (b) O2 (c) CO2 (d) N2 41. Which of the following metals are present in german silver? (a) Zinc, Nickel, Copper (b) Nickel, Silver, Copper (c) Germanium, Silver, Copper (d) Zinc, Silver, Copper
7 42. Which of the following statement is incorrect? (a) The stable oxidation state of all Lanthanides is (+3) (b) The ionic size decreases as we move from Ce +3 to Lu +3 (c) Ce(OH)3 is the least basic among the hydroxides of lanthanides (d) The atomic radius decreases as we move from Ce to Lu 43. Which of the following ions has the maximum theoretical magnetic moment? (a) Co +3 (b) Ti +3 (c) Cr +3 (d) V Which among the following element is radioactive? (a) Pr (b) Pm (c) Tm (d) La 45. Which of the following complex has sp 3 hybridisation? (a) K4[Ni(CN)4] (b) [Ni(NH3)2Cl2] (c) K4[Fe(CN)6] (d) K2[Ni(CN)4] 46. Which of the following complex ions does not possess optical isomerism? (a) [Co(H2O)3Br3] +3 (b) [Co(CO)4(en)] +3 (c) [Co(en)2(NH3)2] +2 (d) [Co(en)(H2O)4] Which of the following complex is useful in the dehydrogenation of alkanes? (a) [(Ph3P)3RhCl2] (b) [(Ph3P)3RhCl] (c) [(Ph3P)3Rh2Cl] (d) [(Ph3P)RhCl] 48. Which of the following compounds undergo aldol condensation? (a) C6H5-CO-C6H5 (b) H-CHO (c) C6H5-CHO (d) C6H5-CO-CH3 49. What is the final product C in the following reaction? (a) Propanoic acid (b) Ethanol (c) Propanol (d) Propane
8 50. What is the IUPAC name of Acrolein? (a) Prop-2-enal (b) 3-Methoxy propanal (c) Pentanal (d) But-2-enal GUJCET - CRASH COURSE COMMENCING FROM 24TH MARCH SKV INSTITUTE
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