Which product is formed when an alkyl halide reacts with dialkyl copper lithium (Gilman reagent)?

Which of the following reactants is suitable for the preparation of methane and ethane by using one step only?

The addition of tetraethyl lead to petrol:

$n$-Butane on monochlorination under photochemical conditions gives an optically active compound "$P$". "$P$" on further chlorination gives dichloro compounds. The number of dichloro compounds obtained (ignore stereoisomers) is:

Ethyl iodide and $n$-propyl iodide are allowed to undergo Wurtz reaction. The alkane which will not be obtained in this reaction is

Which compound produces methane gas upon reaction with water?