On exciting $Cl_2$ molecule by $UV$ light,we get

To prepare a pure sample of $n-$hexane using sodium metal as one reactant,the other reactant will be

In which of the following reactions are both alkanes and alkenes obtained?

Which one of the following compounds does not decolourize bromine water?

Assertion $(A)$: Cyclohexane is the most stable cycloalkane.
Reason $(R)$: Cyclopropane and cyclobutane are less stable due to angle strain and torsional strain.
The correct answer is

Of the $5$ isomeric hexanes,the isomer which can give $2$ monochlorinated compounds is