A U tube contains water and methylated spirit seperated by mercury .The mercury columns in the two arms at the same level with 10 cm of water in one arm and 12.5 cm of spirit in the order as shown in figure. The relative density of the spirit is

Options

A. (a)` 0.8 `
B. (b)`1.0 `
C. (c)` 1.25 `
D. (d)` 1.2 `

Answer

A

Explanation

` rho _(omega ) xx 10 xx g = rho _ (oil) xx 12. 5 xx g, (10 )/(12.5 ) = (rho _ (oil) ) /(rho _(omega )) , ( rho_(oil)) / ( rho _ (omega )) = 0.8 `