Question

On mixing certain alkane with chlorine and irradiating it with ultraviolet light,it forms only one mono-chloroalkane. The alkane is :

• A. iso-pentane
• B. neo-pentane
• C. propane
• D. pentane

Answer 1

Answer: (B)

neo-pentane

Answer 2

Neo pentane $CH_3 - \underset{\overset{|}{C}H_3}{\overset{\underset{|}{C}H_3}{C}} - CH_3$ contains all hydrogen atoms equivalent, so it will give only one monochloroderivative on halogenation.