The following reaction is described as:
$CH_3(CH_2)_5-CH(CH_3)-Br + OH^- \rightarrow HO-CH(CH_3)(CH_2)_5CH_3 + Br^-$

In an $S_N1$ reaction on chiral centres,there is

Which of the following alkyl halides gives only one product (excluding stereoisomers) when undergoing an $E_2$ reaction? $(E_2 = \text{elimination bimolecular})$

The reaction of $C_6H_5CH=CHCH_3$ with $HBr$ produces

The major product of the following reaction is:

Pure $CHCl_3$ and pure $CHI_3$ can be distinguished by which of the following?