The final product of the following reaction contains:
$CH_3 - C \equiv C - CH_2 - COCl \xrightarrow[BaSO_4]{H_2 - Pd}$

What is the product $R$ in the following reaction sequence?

Which of the following statements regarding the chemical properties of acetophenone is incorrect?
$I.$ It is reduced to methyl phenyl carbinol by sodium and ethanol.
$II.$ It is oxidized to benzoic acid with acidic $KMnO_4$.
$III.$ It does not undergo electrophilic substitution reactions (like nitration at the $m$-position).
$IV.$ It does not give the iodoform test with iodine and alkali.

The product $(A)$ is:

Identify the reaction in which the carbonyl group of aldehydes and ketones is reduced to a methylene group upon treatment with hydrazine followed by heating with sodium hydroxide in ethylene glycol.

The major product of the following reaction is: