Question

The molecular formula of an organic compound X is $C_5{H}_{12}O$. The possible number of position isomers of X are _______.

• A. 4
• B. 3
• C. 2
• D. 7

Answer 1

The correct option is B 3

The possible compounds for molecular formula $C_5{H}_{12}O$ are pentanol and tert-butyl methyl ether. Pentanol can have 3 positional isomers whereas tert-butyl methyl ether does not show any position isomers.
The position isomers of pentanol are
1- pentanol, 2- pentanol and 3-pentanol.
Generally ethers show metamerism. This occurs due to the unequal distribution of carbon atoms on either side of the functional groups.