On reaction with hot conc. $H_2SO_4$,which one of the following compounds loses a molecule of water?

But$-2-$ene on reaction with alkaline $KMnO_4$ at elevated temperature followed by acidification will give:

The total number of alkyl bromides (including stereoisomers) formed in the reaction $(CH_3)_3C-CH=CH_2 + HBr \rightarrow$ will be

Which hydrogen in compound $(E)$ is easily replaceable during bromination reaction in the presence of light?
$CH_3 - CH_2 - CH = CH_2$
$(E)$

Suppose the following reaction sequence: $CH \equiv CH$ $\xrightarrow[\text{excess}]{NaNH_2 / \text{liq. } NH_3} A$ $\xrightarrow{2 CH_3 - I} B$ $\xrightarrow{H_2 / Pd - BaSO_4, \text{ quinoline}} C$ and $C$ $\xrightarrow{H_2 / Pd - BaSO_4, \text{ quinoline}}$ $\xrightarrow{NaNH_2 / \text{liq. } NH_3} D$. How are $C$ and $D$ related?

Propane is obtained from propene by which method?