A barometer has liquid-1 with density 5 Kg/m^3 and height 10 cm below the outside level above that there is liquid-2 of length 5 cm, if the gauge pressure of the gas is 1 Pa, what is the density of liquid-2?
(a) 2 Kg/m^3
(b) 4 Kg/m^3
(c) 6 Kg/m^3
(d) 8 Kg/m^3
This question was addressed to me in an online interview.
Asked question is from Differential Pressure Measurements topic in section Temperature and Pressure of Basic Chemical Engineering