In keto-enol tautomerism of $\mathrm{\beta }-$dicarbonyl compounds; the enol-form is preferred in contrast to the keto-form, this is due to:

Benzaldehyde can be prepared by the hydrolysis of:

Which of the following reactions can produce $\mathrm{R}-\mathrm{CO}-\mathrm{Ar}$?

Which of the following compounds gives a ketone with Grignard reagent?

The conversion $\mathrm{PhCN}\to {\mathrm{PhCOCH}}_3$ can be achieved most conveniently by the reaction with

The product(s) obtained via oxymercuration $\left({\mathrm{HgSO}}_4+{\mathrm{H}}_2{\mathrm{SO}}_4\right)$ of $1-$butyne would be

The addition of $\mathrm{HCN}$ to carbonyl compounds is an example of

Acetal is produced by reacting alcohol in the presence of dry $\mathrm{HCl}$ with

Acetone oxime is obtained by reacting acetone with