68. anhydrous C6H6 + CH3C1- C6H5CH3 + HC1 AlCl3 is an example of : (1) Friedel-Crafts reaction (2) Kolbe's synthesis (3) Wurtz reaction (4) Grignard reaction 69. Choose the type of reaction involved for (P) & (Q) respectively: HBr (Q) HO (1) Addition, Substitution (2) Substitution, Addition (3) Substitution, Substitution (4) Addition, Addition Br, (P) 500 C 70. CH3 CH3-C-Br CH,-O Major product: CH3 CH3 I (1) CH3-C-O-CH3 (2) CH3 CH3-C=CH2 CH3 (3) CH3-CH=CH-CH3 (4) Both (1) and (2) 71. Among the given compounds the most susceptible (reactive) to nucleophilic attack at the carbonyl group is (1) CH3COCI (2) CH3COOCH3 (3) CH3CONH (4) CH3COOCOCH3