Hydrocarbons Question 255
Question: Which one of the following compounds would have the highest heat of hydrogenation-
Options:
A) $ CH_2=CH_2 $
B) $ CH_3-CH_2-CH=CH_2 $
C) $ CH_3CH=CHCH_3 $
D) $ {{( CH_3 )}_2}C=C{{( CH_3 )}_2} $
Show Answer
Answer:
Correct Answer: A
Solution:
[a] The heat of hydrogenation of an alkene depends upon its stability.
Higher the stability, lower the heat of hydrogenation.
Since $ CH_2=CH_2 $ has no substituent, it is the least stable alkene and hence has the highest heat of hydrogenation
BETA
