A glass tube AD of uniform cross section of length 100 cm contains two columns of ideal gas AB and CD, respectively, a column of mercury of length 20 cm. When the tube is horizontal, AB = 20 cm and CD

Question

A glass tube AD of uniform cross section of length 100 cm contains two columns of ideal gas AB and CD, respectively, a column of mercury of length 20 cm. When the tube is horizontal, AB = 20 cm and CD = 60 cm. When the tube held vertically with the end A up, the mercury column moves down 10 cm. Which of the following statement is correct for the tube?

Prashant Kotian · Accepted Answer

Correct answer: A,D. 60 cm Po Po A B C D 20 cm 20 cm 50 cm A B C D 20 cm 30 cm For column AB 1 1 2 2 P V P V  o 2 P 20A P 30A    o o 2 P 20A 2P P 30A 3    For column CD AITS-FT-XI (Paper-1)-PCM(Sol.)-JEE(Advanced)/22 FIITJEE Ltd., FIITJEE House, 29-A, Kalu Sarai, Sarvapriya Vihar, New Delhi -110016, Ph 46106000, 26569493, Fax 26513942 website: www.fiitjee.com 10 1 1 2 2 P V P V   o 2 P 60A P 50A    o 2 6P P 5  2 2 P P 20   o o 6P 2P 20 5 3   o P

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