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Q.

A non-conducting body floats in a liquid at 20oC with 23 of its volume immersed in the liquid. When liquid temperature is increased to 100oC,34 of body's volume is immersed in the liquid. Then, the coefficient of real expansion of the liquid is (neglecting the expansion of container of the liquid)

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a

15.6 × 10-4/°C

b

156 × 10-4/°C

c

1.56 × 10-4/°C

d

0.156 × 10-4/°C

answer is A.

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Detailed Solution

Coefficient of real expansion,                     γR=V2-V1V1T2-T1Here,            V2=34,V1=23and                (T2 -T1) = (100 - 20) = 80∘C∴                            γR=34-2323(80)=1640=15.6×10-4∘C-1
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