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Question

After placing a metal pencil box in sunlight during mid-day for an hour, it is dropped in a bowl containing tap water at room temperature. Choose the correct statement.​


A
Heat will flow from pencil box to tap water.​
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B
Heat will flow from tap water to pencil box.​
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C
There will be no heat flow.​
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D
Insufficient data​
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Solution

The correct option is A Heat will flow from pencil box to tap water.​
Metals are good conductors of heat. As the metal pencil box is placed in sunlight, its temperature will rise and it will become hot. Also, we know that heat can always flow from a higher temperature to a lower temperature.

Here, the pencil box is at a higher temperature than the water.

Therefore, heat will flow from the pencil box to tap water.

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