Knocking sound occurs in an engine when fuel:

Number of bromo derivatives obtained on treating ethane with excess of $Br_2$ in diffused sunlight is $..........$.

Among the isomeric alkanes of molecular formula $C_{5}H_{12}$,identify the one that on photochemical chlorination yields:
$(i)$ $A$ single monochloride.
$(ii)$ Three isomeric monochlorides.
$(iii)$ Four isomeric monochlorides.

Natural gas is a mixture of

How many dichloro products are formed in the reaction of cyclopentane with excess $Cl_2$ in the presence of $h\nu$ (including stereoisomers)?

When a certain alkane is mixed with chlorine and irradiated with ultraviolet light,only one monochloroalkane is formed. This alkane is likely to be: