Which of the following cannot be prepared using the Wurtz reaction?

The molecular formula of an alkane having a weight of $11 \ g$ and a volume of $5.6 \ L$ at $STP$ is.......

$A$ compound reacts with $Cl_2$ to give product $(B)$,and the reaction of product $(B)$ with $(Zn + \text{dilute } HCl)$ gives back the original substance $(A)$. Give the structures of $(A)$ and $(B)$.

One mole of an alkane $(x)$ requires $8$ mole oxygen for complete combustion. The sum of the number of carbon and hydrogen atoms in the alkane $(x)$ is . . . . . . .

When a mixture of methane and oxygen is passed over heated molybdenum oxide, the product obtained is ........ .

Identify the major product $(99 \%)$ formed when $(CH_3)_3CH$ is treated with $Br_2$ in $UV$ light.