The limbs of a glass U - tube are lowered into vessels A and B, A containing water. Some air is pumped out through the top of the tube C. The liquids in the left hand limb A and the right hand limb B rise to heights of 10 cm and 12 cm respectively. The density of liquid B is:

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0.75 g/cm3

0.83 g/cm3

1.2 g/cm3

0.25 g/cm3

answer is B.

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Detailed Solution

PA=PB⇒10 cm ×ρw×g=12 cm ×ρLg ⇒ ρL=10×112=0.83 g/cm3

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