301. At constant pressure, with increase of temperature, the dew point will
Increase
Decrease
Remain unchanged
Increase/decrease ; depends on the temperature
✅ The correct answer is option A.
Mass Transfer MCQs
302. Components, having widely different boiling point in a binary mixture, can be separated using __________ distillation.
Molecular
Extractive
Steam
Simple
✅ The correct answer is option D.
303. In Mcabe-Thiele method, at infinite reflux ratio
Number of plates is maximum
Overhead product is maximum
Both the operating lines coincide with the diagram
None of these
✅ The correct answer is option C.
304. In case of gases, the binary diffusivity is proportional to (where, P = pressure)
P
1/P
1/√P
√P
✅ The correct answer is option B.
305. Separation of two or more components of a liquid solution can not be achieved by
Fractional crystallisation
Liquid extraction
Absorption
Evaporation
✅ The correct answer is option C.
306. Separation of two volatile liquids by distillation makes use of their
Selectivity
Relative volatility
Solubility
Density difference
✅ The correct answer is option B.
307. Steam distillation is used for separation of high boiling
Substances from non-volatile impurities
Volatile impurity from still higher boiling substances
Both A & B
Neither A nor B
✅ The correct answer is option C.
308. At what percentage (by volume) of alcohol composition, it forms an azeotrope with water?
90
91.5
95
99
✅ The correct answer is option C.
309. Calcium ammonium nitrate (a fertiliser) is dried in a __________ dryer.
Rotary
Vacuum
Tunnel
Tray
✅ The correct answer is option A.
310. If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is
0
1
< 1
> 1
✅ The correct answer is option B.