The given figure shows the heating curve of a substance. Straight parts ab and cd of the curve show that
A
No heating is done during this period
B
Heat energy is used to overcome the forces of attraction between the particles
C
Thermometer showed some error during this period
D
Energy of particles of the substance is zero during this period.
Text Solution
Verified by Experts
The correct Answer is:
B
Straight parts ab and cd show that temperature remains constant during this time period. It happens during phase change (from solid to liquid in ab and from liquid to vapour in cd.) as heat energy is used to overcome the forces of attraction between the particles and hence temperature does not change.
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