Q. Heat of combustion of a substance:
A) Is always positive
B) Is always negative
C) Is equal to heat of formation
D) Nothing can be said without reaction
Explanation
The correct answer is Option B: Is always negative.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.