(a) Write the chemical reaction involved in Etard reaction. (b) Arrange the following in the increasing order of their reactivity towards nucleophilic addition reaction: CH3−CHO, C6H5COCH3, HCHO (c) Why is pKa of Cl−CH2−COOH lower than the that of CH3COOH? (d) Write the product in the following reaction: CH3CH2CH=CH−CH2CN1.(i−Bu)2AIH−−−−−−−−−→2.H2O (e) A and B are two functional isomers of compound C3H6O. On heating with NaOH and I2, isomer A forms yellow precipitate of iodoform whereas isomer B does not form any precipitate. Write the formulae of A and B.

(a) Write the chemical reaction involved in Etard reaction. (b) Arran

1.	(a) Write the chemical reaction involved in Etard reaction. (b) Arrange the following in the increasing order of their reactivity towards nucleophilic addition reaction: CH3−CHO, C6H5COCH3, HCHO (c) Why is pKa of Cl−CH2−COOH lower than the that of CH3COOH? (d) Write the product in the following reaction: CH3CH2CH=CH−CH2CN1.(i−Bu)2AIH−−−−−−−−−→2.H2O (e) A and B are two functional isomers of compound C3H6O. On heating with NaOH and I2, isomer A forms yellow precipitate of iodoform whereas isomer B does not form any precipitate. Write the formulae of A and B.
Answer» (a) Write the chemical reaction involved in Etard reaction. (b) Arrange the following in the increasing order of their reactivity towards nucleophilic addition reaction: $C H_{3} - C H O, C_{6} H_{5} C O C H_{3}, H C H O$ (c) Why is $p K_{a}$ of $C l - C H_{2} - C O O H$ lower than the that of $C H_{3} C O O H$ ? (d) Write the product in the following reaction: $C H_{3} C H_{2} C H = C H - C H_{2} C N 1. (i - B u)_{2} A I H - -------- \to 2. H_{2} O$ (e) A and B are two functional isomers of compound $C_{3} H_{6} O$ . On heating with NaOH and $I_{2}$ , isomer A forms yellow precipitate of iodoform whereas isomer B does not form any precipitate. Write the formulae of A and B.