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In an experiment to find the coefficient of real expansion of Hg, 70cm coloumn of Hg at $0^{0} C$ is found to balance 71.26c, coloumn of Hg at $100^{0} C$ . $γ_{R}$ of mercury is $n \times 10^{- 6} /^{0} C$ where n=

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1.8

0.018

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detailed solution

Correct option is A

coefficient of real expansion of liquid is γR=h2−h1h1Δt h2=71.26cm,h1=70cm are heights of liquid in manometer; Δt=100 is change in temperature γR=71.26−7070×100 γR=1.2670×100=0.18×10−3 γR=180×10−6 ∴n=180

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