In the following reaction
$C_6H_5CH_2Br \xrightarrow[{(ii)H_3O^{+}}]{{(i)Mg, \text{Ether}}} X$
Product $X$ is

In $E2$ elimination,many substances follow the Hofmann rule,which means.....

Which compound in each of the following pairs will react faster in $S_N2$ reaction with $OH^{-}$?
$(i)$ $CH_3-Br$ or $CH_3-I$
$(ii)$ $CH_3-C(CH_3)_2-Cl$ or $CH_3-Cl$

Which of the following is boiled with ethyl chloride to form ethyl alcohol?

Consider the following anions:
$(I)$ $CF_3SO_3^-$
$(II)$ $C_6H_5SO_3^-$
$(III)$ $C_6H_5O^-$
$(IV)$ $CH_3COO^-$
When attached to $sp^3$ hybridized carbon,their leaving group ability in nucleophilic substitution reaction decreases in the order:

Identify the products $A$ and $B$ in the reactions :
$R-X + AgCN \longrightarrow A + AgX$
$R-X + KCN \longrightarrow B + KX$