The number of possible enantiomeric pairs that can be produced during monochlorination of $2$-methylbutane is

The radical chain reaction of ethane with chlorine proceeds via a free radical mechanism. Which of the following represents the correct chain propagation steps?

Explain the difference between an alkane and an alkyl group with an example.

Sodium ethanoate on heating with soda lime gives '$X$'. Electrolysis of aqueous solution of sodium ethanoate gives '$Y$'. '$X$' and '$Y$' respectively are

Among the following free radical bromination reactions,select those in which a $2^o$ halide is the major product. The reactions are as follows:
$(P)$ Cyclohexane + $Br_2/hv$
$(Q)$ Methylcyclobutane + $Br_2/hv$
$(R)$ Ethylbenzene + $Br_2/hv$
$(S)$ $3-$Methylhexane + $Br_2/hv$
$(T)$ Decalin + $Br_2/hv$
$(U)$ Butane + $Br_2/hv$

$X$ is an isomer of $C_6H_{14}$. It has four primary carbons and two tertiary carbons. '$X$' can be prepared from which of the following reactions?