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If the difference in the level of Hg in an open arm manometer [One end open to atmosphere and other end is connected to gas chamber] is 5 mm. Then what can be the pressure of gas? (Given: 1atm $= 1.01325 \times 10^{5} N / m^{2})$

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765 mm of Hg

755 mm of Hg

765 torr

700 torr

answer is A, B, C.

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Detailed Solution

2 situations are possible :

$P = 760 + 5 mm$ $P = 760 - 5$

or $765 torr$ $= 755 mm$

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