Question

Which of the following compound is an isomer of the compound given above?

• A. Butane
• B. Butene
• C. Butyne
• D. Cyclobutene

Answer 1

The correct option is B

Butene

The given compound is cyclobutane. Isomers are the compounds having the same molecular formula but different physical and chemical properties. The molecular formula of cyclobutane is $C_4{H}_8$. Now, let's see the molecular formula of the compounds given in the option.

• The molecular formula of butane is $C_4{H}_{10}$
• The molecular formula of butene is $C_4{H}_8$
• The molecular formula of butyne is $C_4{H}_6$
• The molecular formula of cyclobutene is $C_4{H}_6$

The molecular formula of cyclobutane and butene is same i.e. both have the molecular formula $C_4{H}_8$. Therefore, butene is an isomer of cyclobutane.