EXERCISE-II (Previous Year Questions)

Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their

Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is _____.

Trichloroacetaldehyde was subjected to the Cannizzaro's reaction by using $\mathrm{NaOH}$. The mixture of the products contain sodium trichloroacetate ion and another compound. The other compound is :

Compound (A) ${\mathrm{C}}_8{\mathrm{H}}_9\mathrm{Br}$, gives a white precipitate when warmed with alcoholic ${\mathrm{AgNO}}_3$. Oxidation of (A) gives an acid (B) ${\mathrm{C}}_8{\mathrm{H}}_6{\mathrm{O}}_4$
(B) easily forms anhydride on heating. Identify the compound (A).

Which one of the following orders of acid strength is correct?

Assertion : Isobutanal does not give iodoform test

Reason : It does not have $\alpha$-hydrogen. 

Assertion (A) : Acetophenone shows aldol condensation.

Reason (R) : Acetophenone contains carbonyl group.

Assertion (A): ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CH}\left(\mathrm{OH}\right){\mathrm{CH}}_3$ gives benzoic acid with $\mathrm{NaOBr}$ followed by hydrolysis.

Reason (R): First dehydration occur then oxidation.