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Question: Answered & Verified by Expert
In the given figure, atmospheric pressure p0=1 atm and mercury column length is 9 cm. Pressure p of the gas enclosed in the tube is

PhysicsMechanical Properties of FluidsNEET
Options:
  • A Pressure of 67cm of Hg
  • B Pressure of 90cm of Hg
  • C Pressure of 78cm of Hg
  • D Pressure of 85cm of Hg
Solution:
2134 Upvotes Verified Answer
The correct answer is: Pressure of 85cm of Hg
Given,

Atmospheric pressure p0=1 atm=76 cm of Hg

Pressure due to mercury column p=9 cm of Hg


We know that, pgas=patm+p

pgas=76 cm of Hg+9 cm of Hg

pgas=85 cm of Hg

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