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Question

Four identical conical flasks A, B, C & D each are filled with 500 ml of water. The flasks A, B, C & D are heated till the water attain temperatures of 45 C,55 C,65 C and 85 C respectively. Which of the following flasks, contain the highest water level?

A
Flask A
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B
Flask B
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C
Flask C
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D
Flask D
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Solution

The correct option is D Flask D


Liquids tend to expand when their temperature increases, this expansion of a liquid on being heated is called thermal expansion of the liquid. For example, the same mass of boiling water occupies more volume at 100 C than at 20 C.

Since, Flask D attains the highest temperature of 85 C so it will contain the highest water level.

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