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Q.

Water at 4C is filled to the brim in two beakers of glass of negligible coefficient of expansion. A boy performed an experiment of heating beaker (A) and cooling beaker (B). The observation he made is 

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a

In both cases water level went down

b

Water overflows in beaker (B)

c

Water overflows in beaker (A)

d

Water overflows in beaker (B) and went down in beaker (A)

answer is A, B.

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Detailed Solution

Due to anomalous expansion of water, water will have highest density at 40C. So if we cool it or heat it from that temperature, water expands resulting in overflow.

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