Question

how would you prepair alkanes from the alkyl halide

Answer 1

FROM ALKYL HALIDES (By Wurtz Reaction)
Alkyl halides are halogen derivatives of alkanes with general formula R-X. They can be used to prepare alkanes by Wurtz reaction:
It involves the chemical reaction between alkyl halides (usually bromides and iodides) and metallic sodium in the presence of dry ether. The product is the symmetrical alkane containing twice the number of carbon atoms present in the alkyl halide.