Question

Which of the following is an isomer of 2,2- dimethyl propane?

• A. Neopentane
• B. 2-methyl butane
• C. Cyclopentane
• D. Methyl cyclobutane

Answer 1

The correct option is B

2-methyl butane

$C{H}_3-\stackrel{C{H}_3}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}C{H}_3$ Number of Carbon atoms are 5

Methyl butane has $C_5{H}_{12}$ compounds which have same number of carbon atoms but differ in the length of carbon chain are called chain isomers.