The product formed by the reaction of chlorine with benzaldehyde in the absence of a catalyst is

The products $(A)$ and $(B)$ respectively in the above reaction are:

Identify the products $(A)$ and $(C)$ in the following reaction sequence:
$Cyclopentyl-^{14}CN + CH_3MgBr$ $\xrightarrow{H_3O^\oplus} (A)$ $\xrightarrow{NaOI} (B) + (C)$

The best reagent to convert $pent-3-en-2-ol$ into $pent-3-yn-2-one$ is

What is the product of the following reaction?

Which of the following statements is incorrect?