A glass bulb is coninected to an open li...

A glass bulb is coninected to an open limb manometer. The level of mercury in both limbs of the manometer was same. The bulb was heated to `57^(@)C`. If the room temperature and the atmospheric pressure were `27^(@)C and 750` mm, the difference of levels in the two limbs now will be:

2.5 cm

5.0 cm

7.5 cm

10.0 cm

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