Question

Among the following pairs identify the one which gives more heat of hydrogenation:

• A. I
• B. II
• C. both are equal
• D. cannot determine

Answer 1

The correct option is A I

Compound (I) is a terminal alkene and compound (II) is non terminal alkene.
Compound (II) is more substituted (and hence more stable) than compound (I).
Hence, compound (I) has more heat of hydrogen than compound (II).