Water at 40C is filled to the brim of 2 beakers. A boy performed an experiment A of heating and B of cooling. The observation was :
water level in B went down and in A water flowed out
water flowed out in both the cases
water level went down in both cases
water flowed out in B and water level went down in A
A
water flowed out in both the cases
B
water flowed out in B and water level went down in A
C
water level went down in both cases
D
water level in B went down and in A water flowed out
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Solution
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Water has anomalous expansion from 40C to 00C. Water expands when heated from 40C onwards. Since water expands in both the cases, it will overflow from both experiments A and B.
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Water at 40C is filled to the brim of 2 beakers. A boy performed an experiment A of heating and B of cooling. The observation was :
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An experimental set-up is given here to demonstrate that CO2 is given out during respiration. Four students made the following observations marked as I, II, III and IV.
I. Level of water remained the same in both the beaker and the delivery tube
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(2) II
(3) III
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