Appeared in: 2024 (3 sets)
(a) (i) Explain with the help of chemical reaction when:
(I) Acetone is treated with semicarbazide.
(II) Two molecules of benzaldehyde are treated with conc. $\text{NaOH}$.
(III) Butan-2-one is treated with $\text{Zn/Hg}$ and conc. $\text{HCl}$.
(ii) Arrange the following in the increasing order of their acidic strength:
(I) $\text{CH}_3\text{CH}_2\text{CH}_2\text{COOH}$, $\text{BrCH}_2\text{CH}_2\text{CH}_2\text{COOH}$, $\text{CH}_3\text{CHBrCH}_2\text{COOH}$, $\text{CH}_3\text{CH}_2\text{CHBrCOOH}$
(II) Benzoic acid, 4-Methoxybenzoic acid, 4-Nitrobenzoic acid, 3,4-Dinitrobenzoic acid