The order of reactivity of the following compounds towards the esterification with acetic acid is:

What is the number of hydroxyl groups present in propylene glycol?

The major product of the following reaction is:

Absolute alcohol ($100\%$ alcohol) is obtained by the distillation of rectified spirit over which of the following?

What is the product '$A$' in the following reaction?
(Image of an epoxide ring fused to a cyclopentane ring with an exocyclic double bond,reacting with $H_3O^{\oplus}$ to form $A$.)

Match the compounds in Column-$I$ with their major dehydration products in Column-$II$.

Column-$I$ (Compound)	Column-$II$ (Major Product)
$A$. $1$-Methylcyclohexanol	$i$. $1$-Methylcyclohexene
$B$. Butan-$1$-ol	$ii$. But-$1$-ene
$C$. tert-Butyl alcohol	$iii$. Isobutylene
$D$. Butan-$2$-ol	$iv$. But-$2$-ene