Wurtz reaction, the reagent used is______

Which of the following compounds CANNOT be prepared by Wurtz reaction?

When ethyl iodide and propyl iodide react with $\mathrm{Na}$ in the presence of ether, they form_____

The ascending order of boiling points of the following compounds is.

$$\begin{gathered} {\mathrm{CH}}_{\mathrm{3}}-{\mathrm{CH}}_{\mathrm{2}}-{\mathrm{CH}}_{\mathrm{2}}-{\mathrm{CH}}_{\mathrm{2}}-{\mathrm{CH}}_{\mathrm{3}} \\ \left(\mathrm{i}\right) \end{gathered}$$           $$\begin{gathered} {\text{CH}}_{\mathrm{3}}\mathrm{-}\underset{|}{\mathrm{C}}\mathrm{H}-{\mathrm{CH}}_{\mathrm{2}}-{\mathrm{CH}}_{\mathrm{3}} \\ {\mathrm{CH}}_{\mathrm{3}} \\ \left(\mathrm{ii}\right) \end{gathered}$$                              $$\begin{gathered} {\mathrm{CH}}_{\mathrm{3}} \\ {\mathrm{CH}}_{\mathrm{3}}\mathrm{-}\underset{\left|}{\overset{\right|}{\mathrm{C}}}-{\mathrm{CH}}_{\mathrm{3}} \\ {\mathrm{CH}}_{\mathrm{3}} \\ \left(\mathrm{iii}\right) \end{gathered}$$

Photochemical chlorination of alkane is initiated by a process of:

Which of the following is not formed by the reaction of ${\mathrm{Cl}}_{\mathrm{2}}$ on ${\mathrm{CH}}_4$ in sunlight?

With which halogen, the reaction of alkanes are explosive?