The tetraethyl lead mixed in petrol works as

Which alkane is secreted by cockroaches to attract the opposite gender of its species?

$A$ molecule which has $1^{\circ}$,$2^{\circ}$ and $3^{\circ}$ carbon atoms is

Consider the given sequence of reactions.
$C_2H_6 + \frac{3}{2}O_2$ $\xrightarrow[\Delta]{(CH_3COO)_2Mn} X$ $\xrightarrow{NaOH} Y$
Electrolysis of aqueous solution of $Y$ gives gases $P$ and $Q$ at anode. $P$ and $Q$ are respectively.

$CH_4$ is formed when:

Which one of the following cannot be prepared by Wurtz reaction?