Mass Transfer
If G = insoluble gas in gas stream and L = non-volatile solvent in liquid stream, then the slope of the operating line for the absorber is

None of these
G/L
Always < 1
L/G

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
Fenske's equation for determining the minimum number of theoretical stages in distillation column holds good, when the

Relative volatility is reasonably constant
Multicomponent distillation is involved
Mixture (to be separated) shows positive deviation from ideality
Mixture (to be separated) shows negative deviation from ideality

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
In a counter-current liquid extractor

Liquid's flow rate depends upon the temperature and pressure
Both liquids flow at fixed rate
Both liquids can have any desired flow rate
Only one of the liquids may be pumped at any desired rate

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because

Water has a high latent heat of evaporation
Lewis number is close to unity
They are always equal under all circumstances
Solubility of the components of air in water is very small

ANSWER DOWNLOAD EXAMIANS APP