15. 16. What is the final product (major) 'A' in the given reaction? CH3 OH CH CH3 HCI + 'A' (major product) CH3 CH3 Cl CH (B) CH3 CH2-CH3 (A) CH3 CH (C) shiks CH=CH2 (D) Which of the following reagent is used for the following reaction? CHCH,CH, +CHCH,CHO (a) Manganese acetate (b) Molybdenum oxide (c) Potassium permanganate (d) Copper at high temperature and pressure 17. In the following reaction the reason why meta-nitro product also formed is: NH2 NH2 NH2 NH2 NO2 Conc. HNO3 + Conc. HSO, 288 K NO2 NO2 [A] [B] [C] 51% 47% 2% (a) Formation of anilinium ion (b)-NH2 group is highly meta- directive (c) -NO substitution always takes place at meta- position 18. (d) low temperature Which of the following are isostructural pairs? A. SO and Cro B. SiCl4 and TiCl4 C. NH3 and NO D. BCl3 and BrCl 3 (a) C and D only (b) A and B only (c) A and C only (d) B and C only 19. Out of the following which type of interaction is responsible for the stabilization of -helix structure of proteins? (a) Hydrogen bonding (b) Covalent bonding (c) Vander Waals forces (d) lonic bonding 20. The gas released during anaerobic degradation of vegetation may lead to: (a) Ozone hole (c) Corrosion of metals (b) Global warming and cancer (b) Acid rain