Mass Transfer
A coalescer in a mixer-settler liquid-liquid extraction coloumn

All of these
Helps in increasing the bubble size entering the settler
Helps in increasing the settling rate of the bubbles
Comprises of thin bed of substances of extended surface having high porosity

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP