621. Leaching of coarse solid lumps is also termed as
Decoction
Dissolution
Percolation
Agitation and settling
✅ The correct answer is option C.
Mass Transfer MCQs
622. Which of the following employs an accessory known as ‘drift eliminator’ ?
Multiple effect evaporator
Mechanical draft cooling tower
Rotary dryer
Rotating disc contactor
✅ The correct answer is option B.
623. The recovery of pencillin from the acidified fermentation broth is done by
Distillation
Evaporation
Absorption
Liquid extraction
✅ The correct answer is option D.
624. ‘Absorption with chemical reaction’ is involved in the removal of
Carbon dioxide from gaseous stream using alkaline solution
Benzol from coke oven gas using solar oil/wash oil
Ammonia from coke oven gas using refrigerated water
Tar from coke oven gas in primary gas coolers using chilled water
✅ The correct answer is option A.
625. Which of the following equipments is not used for gas dispersion?
Agitated vessels
Bubble cap tray towers
Perforated sieve tray towers
Spray towers
✅ The correct answer is option D.
626. Which of the following binary systems is an example of a maximum boiling azeotrope?
Water-hydrochloric acid
Acetone-carbon disulphide
Water-ethyl alcohol
N-heptane-n-octane
✅ The correct answer is option A.