The reaction $CH_3Br + 2Na + BrCH_3 \to C_2H_6 + 2NaBr$ is known as ............ reaction.

Complete combustion of $CH_4$ gives

Successive alkanes differ by

Different hydrogen atoms in the compound $CH_3-CH=CH-CH_2-CH_2-CH(CH_3)_2$ are represented by alphabets $A, B, C, D, E, F$. Arrange them in decreasing order of reactivity towards free radical substitution.

$CH_3COOH$ $\xrightarrow{\text{Sodalime}} (A)$ $\xrightarrow{Br_2 / hv} (B)$ $\xrightarrow[KOH]{\text{Aq.}} (C)$ is $:-$

Minimum resistance in bond rotation will be observed in the compound