Which of the following is an example of an alkane?

Which of the following cycloalkanes gives an open-chain compound when it reacts with bromine?

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:

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

$Br^{\bullet}$ will abstract which of the hydrogen most readily?

What is the molar mass of the third homologue of the alkane series?