Question

Pick out the alkane which differs from the other members of the group:

• A. $2,2$-dimethyl propane
• B. pentane
• C. $2$- methyl butane
• D. $2,2-$ dimethyl butane

Answer 1

The correct option is D $2,2-$ dimethyl butane

2,2-dimethyl propane : $C_5{H}_{10}$

Pentane : $C_5{H}_{10}$

2-methyl butane: $C_5{H}_{10}$

2,2-dimethyl butane : $C_6{H}_{12}$

Options A, B and C are isomers.

Hence, option D differ from other members of the group.