The reaction of acetaldehyde with conc. $KMnO_4$ gives

$OCH-CHO \xrightarrow{OH^{-}} HOCH_2-COO^-$. The reaction given is:

$CH_3CHO + NH_2OH \to CH_3-CH=N-OH$
Under which condition does the above reaction occur?

In the Claisen-Schmidt reaction to prepare $351 \ g$ of dibenzalacetone using $87 \ g$ of acetone,the amount of benzaldehyde required is . . . . . . . $g$. (Nearest integer)

The $Wolff-Kishner$ reduction is used for which of the following?

$P \xrightarrow{H_2 / Pd-BaSO_4} Q \xrightarrow{(i) \text{ conc. } NaOH} R + S$. $R$ and $S$ form benzyl benzoate when treated with each other. Hence,$P$ is