The rate of $\beta$-dehydrohalogenation in the following halides under treatment with a strong base follows the order:

The reaction of $1-$chlorobutane with alcoholic potassium hydroxide $(KOH)$ yields .....................

$(+)-2-$chloro$-2-$phenylethane in toluene racemises slowly in the presence of small amount of $SbCl_5$,due to the formation of

For the given reaction,what is the major product '$A$'?
$3-\text{ethylbenzonitrile} + Br_2 \xrightarrow{UV \text{ light}} A$

The major product of the following reaction is:
$C_6H_5-CH_2-C(Br)(CH_3)-CH_2-CH_3 \xrightarrow[C_2H_5OH]{C_2H_5ONa}$

Consider the following reaction,
$C_2H_5Cl + AgCN \xrightarrow{EtOH / H_2O} \underline{X} \text{ (major)}$
Which one of the following statements is true for $\underline{X}$?
$(I)$ It gives propionic acid on hydrolysis
$(II)$ It has an ester functional group
$(III)$ It has a nitrogen linked to ethyl carbon
$(IV)$ It has a cyanide group