In Wurtz reaction, the reagent used is When ethyl bromide is heated with sodium in dry ether solvent, the alkane obtained is

• When two moles of ethyl bromide react with two moles of sodium in presence of dry or anhydrous ether it forms butane as a product. 

$2{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{Br}\stackrel{\mathrm{Na}/\mathrm{dry} \mathrm{ether}}{\to }{\mathrm{C}}_2{\mathrm{H}}_5-{\mathrm{C}}_2{\mathrm{H}}_5+ 2\mathrm{NaBr}$

It is an example of Wurtz reaction.

The obtained product butane is a symmetrical alkane with double the number of carbon atoms present in the ethyl bromide.