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

In which of the following is the $Baeyer$ angular strain maximum?

Which of the following is $NOT$ obtained when a mixture of methyl chloride and $n-$propyl chloride is treated with sodium metal in dry ether?

Which compound produces $CH_4$ when treated with water?

Among the isomeric alkanes of molecular formula $C_{5}H_{12}$,identify the one that on photochemical chlorination yields:
$(i)$ $A$ single monochloride.
$(ii)$ Three isomeric monochlorides.
$(iii)$ Four isomeric monochlorides.

Explain the formation of alkanes by Kolbe's electrolysis method with an example. Alternatively,describe the preparation of alkanes from carboxylic acids via electrolysis.