What is the product formed when acetic acid reacts with chlorine in the presence of an anhydrous $FeCl_3$ catalyst?

Carboxylic acids contain a carbonyl group but do not show the nucleophilic addition reaction like aldehydes or ketones. Why?

The relative acidic strengths of benzoic acid,$o-$toluic acid and $p-$toluic acid are in the decreasing order:

Identify the product $B$ in the following series of reaction.
$CH_3COOH + CH_3CH_2OH \rightleftharpoons{H^{+}} CH_3COOCH_2CH_3{_{\text{(A)}}} \xrightarrow[Ni/Pd, \Delta]{H_2} CH_3CH_2OH + CH_3CH_2OH{_{\text{(B)}}}$

Consider the following molecules and statements related to them:
$(a)$ $(B)$ is more likely to be crystalline than $(A)$
$(b)$ $(B)$ has a higher boiling point than $(A)$
$(c)$ $(B)$ dissolves more readily than $(A)$ in water.
Identify the correct option from below:

Which of the following shows the correct order of decreasing acidity?