Consider structures I to VII and answer the question
I
II
III
IV
V
VI
VII
Identify the pairs of compounds which are functional group isomers.
Functional group isomers :
Functional group isomers have different functional group.
Compounds I to IV have alcohol functional group and compounds V to VII have ether functional group. So, they are functional group isomers of each other.
Hence, I and V,I and VI,I and VII,II and V,II and VI,II and VII,III and V,III and VI,III and VII,IV and V,IV and VI,IV and VII are pairs of functional group isomers.