Aldol condensation between acetaldehyde and propionaldehyde will give how many products?

Trichloroacetaldehyde was subjected to Cannizzaro’s reaction by using NaOH. The mixture of the products contains sodium trichloroacetate and another compound. The other compound is

If heavy water is taken as solvent instead of normal water while performing Cannizzaro reaction, the products of the reaction are

Which of the following reagent reacts differently with $HCHO,C{H}_{3}CHOHCHO,\; CH\_3CHO$ and $C{H}_{3}COC{H}_{3}CH\_3COCH\_3$?

The reagent used for separation of acetaldehyde and acetophenone is

Which of the following acids on heating loses a molecule of $H_{2}OH\_2O$ to form an $\alpha ,\beta -\backslash alpha,\backslash beta-$unsaturated acid?

The compound that does not liberate $C{O}_{2}CO\_2$, on treatment with aqueous sodium bicarbonate solution is

When propionic acid is treated with aqueous sodium bicarbonate $C{O}_{2}CO\_2$ is liberated. The C of  $C{O}_{2}CO\_2$ comes from

Benzoyl chloride is prepared from benzoic acid by

Which of the following reagents may be used to distinguish between phenol and benzoic acid?