Embibe Experts Solutions for Chapter: Aldehydes, Ketones and Carboxylic Acids, Exercise 1: West Bengal Board-2018

Identify A, B, C and D in the following steps of the reaction of acetaldehyde with dilute aqueous solution of $\mathrm{NaOH}$:

${\mathrm{CH}}_3\mathrm{CHO}+\stackrel{-}{\mathrm{O}}\mathrm{H}\rightleftharpoons \mathrm{A}+\mathrm{B}$

${\mathrm{CH}}_3\mathrm{CHO}+\mathrm{A}\rightleftharpoons \mathrm{C}$

$\mathrm{C}+\mathrm{B}\rightleftharpoons \mathrm{D}+\stackrel{-}{\mathrm{O}}\mathrm{H}$

An organic compound produces acetic acid and ethanol on acid hydrolysis. Write the structural formula of the compound. How can you prepare the compound from acetaldehyde in one step?

Write the structures of $\mathrm{A}$ to $\mathrm{D}$ in the following reactions:

$\mathrm{RCOR}\text{'}\stackrel{{\mathrm{NH}}_2{\mathrm{NH}}_2}{\to }\mathrm{A}\underset{\mathrm{ethylene} \mathrm{glycol}, {180}^{\mathrm{o}}\mathrm{C}}{\overset{{\mathrm{C}}_2{\mathrm{H}}_5\stackrel{-}{\mathrm{O}}\stackrel{+}{\mathrm{Na}}}{\to }}\mathrm{B}$

${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CO}}_2\mathrm{Ag}\underset{{\mathrm{CCl}}_4}{\overset{{\mathrm{Br}}_2}{\to }}\mathrm{C}$

${\mathrm{CH}}_3\mathrm{CHO}+{\mathrm{NaHSO}}_3\to \mathrm{D}$

Distinguish between propanone and pentan-$3$-one by a suitable chemical test.

Write equation of the salicyclic acid to aspirin conversion.

Convert the following:

(p) Benzaldehyde to Cinnamic acid.

(q) Acetic acid to acetaldehyde.

What is the reason for the reducing property of formic acid? Give example of its reducing property.

Mention the reagents used for the following conversions:

(m) ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_3\stackrel{\mathrm{A}}{\to }{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHO}$

(n) ${\mathrm{CH}}_3\mathrm{CHO}\stackrel{\mathrm{B}}{\to }{\mathrm{CH}}_3{\mathrm{COOC}}_2{\mathrm{H}}_5$

(o) ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHO}\stackrel{\mathrm{C}}{\to }{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COCH}\left(\mathrm{OH}\right){\mathrm{C}}_6{\mathrm{H}}_5$

(p) ${\mathrm{CH}}_3{\mathrm{COCH}}_3\stackrel{\mathrm{D}}{\to }{\left({\mathrm{CH}}_3\right)}_2\mathrm{C}\left(\mathrm{OH}\right){\mathrm{CH}}_2{\mathrm{COCH}}_3$

(q) ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{COOH}\stackrel{\mathrm{E}}{\to }{\mathrm{CH}}_3\mathrm{CH}\left(\mathrm{Br}\right)\mathrm{COOH}$

(r) ${\mathrm{CH}}_3{\mathrm{COCH}}_3\stackrel{\mathrm{F}}{\to }{\mathrm{CH}}_3{\mathrm{COCH}}_2\mathrm{Br}$