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Question

A piece of ice is floating in a beaker containing water. When ice melts, the temperature falls from $$20^{\circ}{C}$$ to $$4^{\circ}{C}$$ and the level of water:


A
Remains unchanged
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B
Falls
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C
Rises
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D
Change erratically
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Solution

The correct option is B Falls
The density of water is maximum at 
$$ 4^{\circ}C. $$ Let 'x' amount of ice has 
been melted. Then the volume of 
water at $$ 20^{\circ}C $$ displaced 
to float that 'x' amount of ice 
will be higher than the volume 
of water that has been gained 
after melting of ice as both volumes
have same masses 'x' but the density 
is higher at $$ 4^{\circ}C.$$ consequently, the 
water level falls
Option $$-B $$ is correct 

1104595_319179_ans_7b60fa740f134f98b358c1a9db971c04.jpg

Physics

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