Pure methane can be prepared by

The general formula of a cycloalkane is

The general formula of paraffin is:

Identify the decreasing order of boiling point of the following alkanes:
$(i)$ $n$-pentane
$(ii)$ Isopentane
$(iii)$ Neopentane

The relative reactivity of $1^o H$,$2^o H$,and $3^o H$ in bromination reaction has been found to be $1 : 82 : 1600$ respectively. In the reaction $CH_3-CH(CH_3)-CH_3 \text{ (excess)} + Br_2$ $\xrightarrow{hv} CH_3-C(Br)(CH_3)-CH_3 \text{ (A)} + CH_3-CH(CH_3)-CH_2-Br \text{ (B)}$,the percentage yields of the products $(A)$ and $(B)$ are expected to be:

At $25,^oC$,Ethylene glycol is a: