Physics
The curve which shows the rise of temperature with the amount of heat supplied for a piece of ice is :
- A
- B
- C
- D
Calorimetry
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Answer
D
Reason — When heat is supplied to a piece of ice, its temperature does not rise continuously.
- Initially, the temperature remains constant at 0 °C while the ice melts (latent heat of fusion).
- After complete melting, the temperature of water increases until it reaches 100 °C.
- At this point, the temperature again remains constant during boiling (latent heat of vaporization).
Thus, the temperature vs heat graph shows horizontal portions (constant temperature) during phase changes and sloping portions when temperature rises.
Curve D correctly represents this combination of flat and rising segments, matching the actual heating process of ice.
Hence, curve D is correct.
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