Explain: Alkyl group.

(N/A) An $ \text{alkyl group} $ is a univalent radical derived from an alkane by the removal of one hydrogen atom.
The general formula for an alkane is $ C_nH_{2n+2} $.
By removing one hydrogen atom,the general formula for an alkyl group becomes $ C_nH_{2n+1} $.
These groups are often represented by the symbol $ R $.
For example,removing one hydrogen atom from methane $( CH_4 )$ results in a methyl group $( -CH_3 )$,and removing one hydrogen atom from ethane $( C_2H_6 )$ results in an ethyl group $( -C_2H_5 )$.