Two isomers (A) and (B) with molar mass 184 g/mol and elemental composition C, 52.2%; H. 4.9% and Br 42.9% gave benzoic acid and p-bromobenzoic acid respectively on oxidation with KMnO4. Isomer 'A' is optically active and gives a pale yellow precipitate when warmed with alcoholic AgNO3. Isomer 'A' and 'B' are respectively (A) H3C-CHB-C6H5 and (C) H3C-CHB-C6H5 and CHBr CH3 (B) CHBr CH2CH3 CH3 and Br CH2CH3 CH2CH3 (D) and H3C-CHB-C6H5 Br Br 16. In Friedel-Crafts alkylation of aniline, one gets (a) alkylated product with ortho and para substitution. (b) secondary amine after acidic treatment (c) an amide product. (d) Positively charged nitrogen at benzene ring. 17. Given below are two statements one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Dacron is an example of polyester polymer. Reason R: Dacron is made up of ethylene glycol and terephthalic acid monomers. In the light of the above statements, choose the most appropriate answer from the options given below. (a) Both A and R are correct and R is the correct explanation of A. (b) Both A and R are correct but R is NOT the correct explanation of A. (c) A is correct but R is not correct. (d) A is not correct but R is correct. 18. The structure of protein that is unaffected by heating is (c) primary structure (d) quaternary (a) secondary structure (b) tertiary structure structure 19. The mixture of chloroxylenol and terpineol is an example of (a) Antiseptic analgesic (b) pesticide (c) disinfectant (d) narcotic 20. A white precipitate was formed when BaCl2 was added to water extract of an inorganic salt. Further, a gas 'X' with characteristic odour was released when the formed white precipitate was dissolved in dilute HCI. The anion present in the inorganic salt is (a) I (b) SO (c) S- (d) NO