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Q.

Coefficient of real expansion of mercury is 0.18 X 10/-3°C. If the density of mercury at 0°C is 13.6 g/cc, its density at 200°C is

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a

52.11 g/cc

b

13.11 g/cc

c

26.22 g/cc

d

13.4 g/cc

answer is A.

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Detailed Solution

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ρ=ρ0(1-γ·Δθ)=13.61-0.18×10-3(473-273)

 = 13.6[1   -   0.036]= 13.11g/cc

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Coefficient of real expansion of mercury is 0.18 X 10/-3°C. If the density of mercury at 0°C is 13.6 g/cc, its density at 200°C is