Which of the following is $NOT$ obtained when a mixture of methyl bromide and ethyl bromide is treated with sodium metal in the presence of dry ether?

To prepare a pure sample of $n-$hexane using sodium metal as one reactant,the other reactant will be

Which of the following products is obtained by the controlled oxidation of methane in the presence of copper catalyst at $523 \ K$ and $100 \ atm$?

Choose the chain terminating step.
$(1)$ $H_2 \to H^{\bullet} + H^{\bullet}$
$(2)$ $Br_2 \to Br^{\bullet} + Br^{\bullet}$
$(3)$ $Br^{\bullet} + HBr \to H^{\bullet} + Br_2$
$(4)$ $H^{\bullet} + Br_2 \to HBr + Br^{\bullet}$
$(5)$ $Br^{\bullet} + Br^{\bullet} \to Br_2$

Aluminum carbide on reaction with $D_2 O$ gives $Al(OD)_3$ and '$X$'. What is '$X$'?

$\dot{Cl} + CH_4 \rightarrow A + B$
$A$ and $B$ in the above atmospheric reaction step are.