$CH_3-CH(CH_3)-CH_3 + CH_2=CH_2 \xrightarrow[2.5^oC]{HF} (A)$; $(A)$ is:

In the bromination of isobutane,the relative reactivity rates of $1^oH, 2^oH,$ and $3^oH$ are $1 : 82 : 1600$ respectively. Calculate the percentage yield of products $(a)$ and $(b)$ in the following reaction:
$CH_3-CH(CH_3)-CH_3 (excess) + Br_2 \xrightarrow{hv} (a) CH_3-C(Br)(CH_3)-CH_3 + (b) CH_3-CH(CH_3)-CH_2Br$

Give the name,formula and structure of the cycloalkane which has only one structure.

The octane number of $2, 2, 3-$trimethylbutane is considered to be ............ .

Which of the following is true for the given reaction: $R - H + X_2 \xrightarrow{hv} R - X + H - X$?

What are the physical properties of alkanes?