Q.
The following figure represents the temperature $versus$ time plot for a given amount of a substance when heat energy is supplied to it at a fixed rate and at a constant pressure.
Which parts of the above plot represents a phase change?
A) $a$ to $b$ and $e$ to $f$
B) $b$ to $c\ $and $c\ $to $d$
C) $d$ to $e$and $e\ $to $f$
D) $b$ to $c$ and $d$ to $e$
Explanation
The correct answer is Option D: $b$ to $c$ and $d$ to $e$.
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.