Q. On mixing a certain alkane with chlorine and irradiating it with ultraviolet light, it forms only one monochloroalkane.
A) Propane
B) Pentane
C) $Iso$-pentane
D) $Neo$-pentane
Explanation
(d)
Neo-pentane gives only one monochloro derivative.
$\ \ \ \ \ \ \ \ \ \ \ \ \ CH_{3}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ CH_{3}\ \$
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$CH_{3} - C - CH_{3} + Cl_{2}\overset{\ \ \ \ UV\ \ \ \ }{\rightarrow}CH_{3} - C - CH_{2}Cl$
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$\ \ \ \ \ \ \ \ \ \ \ \ CH_{3}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ CH_{3}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.