A beaker containing hot water is kept in the freezer compartment of a refrigerator (temperature < 0 $^{o}$ C). If you could measure the temperature of the content of the beaker, which of the following graphs would correctly represent the change in its temperature as a function of time?

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Solution

The water will cool initially till it reaches 0 °C, the freezing point. At this stage, the temperature will remain constant till all the water will freeze and start changing into ice. When all the water gets converted into ice, the temperature would fall again.
The trend discussed above about the temperature is followed into one graph that is given below:
Hence, option 'a' is the correct answer.

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A beaker containing hot water is kept in the freezer compartment of a refrigerator (temperature < 0 oC). If you could measure the temperature of the content of the beaker, which of the following graphs would correctly represent the change in its temperature as a function of time?

A beaker containing hot water is kept in the freezer compartment of a refrigerator (temperature < 0 $^{o}$ C). If you could measure the temperature of the content of the beaker, which of the following graphs would correctly represent the change in its temperature as a function of time?