Ethyl bromide reacts with alcoholic $KOH$ to give.....

The transition state of the given $S_N2$ reaction is:

Predict the major product for the following reaction: $CH_3-CH(CH_3)-ONa + (CH_3)_3C-Cl \xrightarrow{\Delta} \text{Major product}$

The correct order for increasing reactivity towards $S_N1$ substitution for the following compounds is:
$1. CH_3CH_2Br$
$2. CH_2=CHCH(Br)CH_3$
$3. CH_2=CHBr$
$4. CH_3CH(Br)CH_3$

Two isomers $(A)$ and $(B)$ with molar mass $184 \ g/mol$ and elemental composition $C, 52.2 \ \%; H, 4.9 \ \%$ and $Br, 42.9 \ \%$ give benzoic acid and $p$-bromobenzoic acid,respectively,on oxidation with $KMnO_4$. Isomer '$A$' is optically active and gives a pale yellow precipitate when warmed with alcoholic $AgNO_3$. Isomer '$A$' and '$B$' are,respectively .... .

The reaction of $p-$bromobenzyl chloride with $NaCN$ in ethanol gives: