$A$ mixture of $1-$chloropropane and $2-$chloropropane when treated with alcoholic $KOH$ gives:

In $S_N1$ reaction, the alkyl halide that on hydrolysis produces a racemic mixture is

Decreasing the concentration of an electrophile (substrate) in a typical $S_N2$ reaction by a factor of $3$ will cause the reaction rate to

Which one of the following chlorohydrocarbons readily undergoes solvolysis?

$A$ $(C_{4}H_{8}Cl_{2})$ $\xrightarrow{\text{Hydrolysis at } 373 \text{ K}}$ $B$ $(C_{4}H_{8}O)$
$B$ reacts with hydroxylamine but does not give Tollen's test. Identify $A$ and $B$.

$1,2-\text{dichloroethane} + NaSCH_2CH_2SNa \to C_4H_8S_2 + (P)$
Unknown product $(P)$ of the above reaction is