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

What is the product of the following reaction?

Assertion : The boiling points of aldehydes and ketones are higher than hydrocarbons and ethers of comparable molecular masses.
Reason : There is a weak molecular association in aldehydes and ketones arising out of the dipole-dipole interactions.

Give the major organic product of the following reaction.

The reaction $CH_3-C(=O)-CH_2-C(CH_3)_2-CHO \xrightarrow{KOH, H_2O} (A)$; Product $A$ is

Which reagent gives an orange-coloured precipitate with acetaldehyde?