On exciting $Cl_2$ molecule by $UV$ light,we get

Why is Wurtz reaction not preferred for the preparation of alkanes containing an odd number of carbon atoms? Illustrate your answer by taking one example.

Identify the reagent $R$ used in the following reaction:
$CH_3-CH(CH_3)-CH_3 \xrightarrow{R} CH_3-C(Br)(CH_3)-CH_3$

What is $Z$ in the following sequence of reaction? $2-$methyl$-2-$bromopropane $\underset{\text{Dry ether}}{}$ ${\xrightarrow{Mg}} X$ $\xrightarrow{H_2O} Z$

The product formed in the first step of the reaction of $CH_3-CH_2-CH(Br)-CH_2-CH(Br)-CH_3$ with excess $Mg / Et_2O$ $(Et = C_2H_5)$ is

Do you expect the carbon hydrides of the type $C_nH_{2n+2}$ to act as 'Lewis' acid or base? Justify your answer.