In the $Wurtz$ reaction,which compound is sometimes formed due to the disproportionation of free radicals?

Consider the following:
Statement-$I$ : Kolbe's electrolysis of sodium propionate gives $n$-hexane as product.
Statement-$II$ : In Kolbe's process,$CO_2$ is liberated at the anode and $H_2$ is liberated at the cathode.
The correct answer is:

Consider the following reaction,$CH_3-CH(D)-CH(CH_3)-CH_3 + \dot{Br} \to X + HBr$. Identify the structure of major product $X$.

$A$ fuel has the same knocking property as a mixture of $70\%$ isooctane and $30\%$ $n$-heptane. The octane number of the fuel is .............

Complete the following reactions for the pyrolysis of $n$-hexane and kerosene:

Which of the following is true for the given reaction: $R - H + X_2 \xrightarrow{hv} R - X + H - X$?