The diagram given below shows phase changes for a substance based on experimental observations. Select the correct statement.

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Heat is being removed from body while increasing temperature

Heat is constant during phase change

Temperature is in Kelvin

The two horizontal lines in the graph represent phase change as the temperature is constant

answer is D.

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Detailed Solution

The diagram represents phase change from solid to liquid to gas. Heat removal leads to decrease in temperature. The temperature becomes zero at an instant, so it can’t be in Kelvin as 0K has never been achieved. The two horizontal lines represent phase change as temperature remains constant at that time.

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