The correct name of the given reaction is

$$\mathrm{Ar}-\mathrm{N}_2^{+} \mathrm{X}^{-} \xrightarrow{\mathrm{CuCN} / \mathrm{KCN}} \mathrm{Ar}-\mathrm{CN}+\mathrm{N}_2$$

Out of the following alkenes, the one which will produce tertiary butyl alcohol on acid catalysed hydration is

Auto-oxidation of chloroform in air and light produces a poisonous gas known as

Transition metals are known to make interstitial compounds. Formation of interstitial compounds makes the transition metal