An alkyl halide on reaction with sodium in the presence of ether gives 2,2,5,5,-tetramethyl hexane. The alkyl halide possibly is

The reaction of alkyl halide with sodium in the presence of ether to produce alkane is known as the Wurtz reaction. 

The reaction is as follows.

${\mathrm{CH}}_3-\mathrm{C}{\left({\mathrm{CH}}_3\right)}_2-{\mathrm{CH}}_2\mathrm{Cl}\underset{\mathrm{ether}}{\overset{\mathrm{Na}}{\to }}{\mathrm{CH}}_3-\mathrm{C}{\left({\mathrm{CH}}_3\right)}_2-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\mathrm{C}{\left({\mathrm{CH}}_3\right)}_2-{\mathrm{CH}}_3$

In the above reaction, the alkyl halide 1-Chloro-2,2-dimethylpropane when reacts with sodium metal in presence of ether gives 2,2,5,5-tetramethyl hexane.