Alcoholic potash is used to bring about

Explain the order of reactivity of $1^o$,$2^o$,and $3^o$ halides towards the $S_N2$ reaction.

The major product of the following reaction is
$C_6H_5CH_2CH_3 + (CH_3)_2CHCH_2Cl \xrightarrow{AlCl_3} \text{?}$

The decreasing order of reactivity towards $S_N 1$ reaction for the following compounds is:

Classify the following reactions into one of the reaction types studied in this unit:
$(a)$ $CH_3CH_2Br + HS^{-} \rightarrow CH_3CH_2SH + Br^{-}$
$(b)$ $(CH_3)_2C=CH_2 + HCl \rightarrow (CH_3)_2ClC-CH_3$
$(c)$ $CH_3CH_2Br + HO^{-} \rightarrow CH_2=CH_2 + H_2O + Br^{-}$
$(d)$ $(CH_3)_3C-CH_2OH + HBr \rightarrow (CH_3)_2CBr-CH_2CH_3 + H_2O$

Chlorination of toluene in the presence of light and heat followed by treatment with aqueous $NaOH$ gives: