A glass bulb is connected to an open limb manometre. 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 750mm, the difference of levels in the two limbs now will be

A glass bulb is connected to an open limb manometre. The level of merc

1.	A glass bulb is connected to an open limb manometre. 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 750mm, the difference of levels in the two limbs now will be
Answer» 2. 5 cm 5.0 cm 7.5 cm 10.0 cm Solution :INITIAL pressure = 75 cm `(P_1)/(T_1) = (P_2)/(T_2) = 75/300 = (P_2)/(320) IMPLIES P_2 = 80 cm`. `:.` diff in LIMB = 5 cm .