Identify the final product $C$ in the following reaction sequence:
$Br-(CH_2)_5-Br$ $\xrightarrow{Na, \text{D.E.}} A$ $\xrightarrow{Br_2, \Delta} B$ $\xrightarrow{\text{alc. KOH}, \Delta} C$

Describe the Kolbe electrolysis reaction of $C_{2}H_{5}COO^{-}Na^{+}$ at the anode and cathode.

Given below are two statements :
Statement-$I$ : $2-$methylbutane on oxidation with $KMnO_4$ gives $2-$methylbutan$-2-$ol.
Statement-$II$ : $n-$alkanes can be easily oxidised to corresponding alcohol with $KMnO_4$.
Choose the correct option:

When the fuel mainly contains ...............,knocking occurs more in the engine.

The chemicals and the reaction conditions required for the preparation of ethane are:

The reaction $CH_4 + Cl_2 \xrightarrow{uv \ light} CH_3Cl + HCl$ is an example of