A `U`-tube of uniform cross section is partially filled with a liquid I. Another liquid II which does not mix with liquid I is poured into one side. It is found that the liquid levels of the two sides of the tube are the same, while the level of liquid I has risen by `2 cm`. If the specific gravity of liquid I is `1.1`, the specific gravity of liquid II must be

Options

A. `1.12`
B. `1.1`
C. `1.05`
D. `1.0`

Answer

B

Explanation

Pressure of line AB is same
`1.1 xx rho g (4) = sigma g xx 4 (sigma "is density liquid")`
`rArr sigma = 1.1 rho rArr (sigma)/(rho) = 1.1`