# Write the molecular formula of first two members of homologous series having functional group −Br. - Science

Write the molecular formula of first two members of homologous series having functional group −Br.

#### Solution

The general formula for the homologous series of functional group −Br is CnH2n+1Br.

The two consecutive members of this series are:

a. CH3Br(Bromomethane)

b. CH3CH2Br (Bromoethane)
where n is 1 and 2 respectively
​The molecular formula for both of them are CH3Br and C2H5Br.

Concept: Homologous Series of Carbon Compound
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