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Given J-tube has 2.4 mL of air at a pres...

Given J-tube has 2.4 mL of air at a pressure of 1 atm. On adding mercury, volume of air is reduced to 1.9 mL as shown. Difference in the level of mercury in two columns is:

A

(a)700 mm

B

(b)200 mm

C

(c )900 mm

D

(d)760 mm

Text Solution

Verified by Experts

The correct Answer is:
B
Atmospheric pressure `=76` mmHg
`implies P_(1)V_(1)=P_(2)V_(2)`
`P_(2)=(P_(1)V_(1))/V_(2)=(760xx2.4)/1.9=960` mmHg
`:.` Difference in column `=960-760=200` mmHg
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