The halogen which is most reactive in the free radical halogenation of alkanes under sunlight is

Identify the major product $'E'$ in the following reaction sequence:
Cyclohexane $\xrightarrow{Br_2, h\nu} (A)$ $\xrightarrow{Na, D.E.} (B)$ $\xrightarrow{Br_2, h\nu} (C)$ $\xrightarrow{H_2O} (D)$ $\xrightarrow{conc. H_2SO_4} (E)$

Methane can be prepared by:

$5 \, L$ of an alkane requires $25 \, L$ of oxygen for its complete combustion. If all volumes are measured at constant temperature and pressure,the alkane is

The major product obtained in the photo-catalyzed bromination of $2-$methylbutane is:

How many chiral products are obtained upon the monochlorination of $2$-methylbutane?