Conc. $H_2SO_4$ reacts with $C_2H_5OH$ at $170\,^{\circ}C$ to form

The major product of the following reaction is:

Which of the following acyclic compounds will react fastest with $Br_2$ gas?

$CH_3-CH=CH_2 \xrightarrow{IBr} \text{Product } (A) \text{ is}$

Identify $C$ in the following series $C_3H_7I$ $\xrightarrow[alc.]{KOH} A$ $\xrightarrow[\Delta]{NBS} B$ $\xrightarrow[alc.]{KCN} C$.

The reaction conditions used for converting $1, 2-$dibromoethane to ethene are