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Question
Refer to the plot of temperature versus time (figure) showing the changes in the state of ice on heating (not to scale).

- The region AB represents ice and water in thermal equilibrium.
- At B water starts boiling.
- At C all the water gets converted into steam.
- C to D represents water and steam in equilibrium at boiling point.
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Solution
a and d
Explanation:
During the process AB temperature of the system is 0°C Hence, it represents phase change that is the transformation of ice into water while the temperature remains 0°C.
BC represents a rise in the temperature of water from 0°C to 100°C (at C).
Now, water starts converting into steam which is represented by CD.
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