7421. An azeotropic mixture is a __________ mixture.
Binary
Ternary
Constant boiling point
None of these
✅ The correct answer is option C.
Chemical Engineering
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7422. A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.
Oct-15
30-40
70-80
90-100
✅ The correct answer is option A.
7423. In an interphase mass transfer process, the lesser the solubility of a given solute in a liquid, the higher are the chances that the transfer process will be
Liquid phase resistance-controlled
Gas phase resistance controlled
Impossible
Driven by a non-linear driving force
✅ The correct answer is option B.
7424. An alkaline solution is used to reduce the concentration of carbon dioxide in a stream from 10% to 0.1% by absorption with irreversible chemical reaction. The overall number of transfer units based on gas phase is
9.21
4.605
100
0.001
✅ The correct answer is option B.
7426. The Hatta number is important in
Multicomponent distillation
Binary distillation
Gas absorption without chemical reaction
Gas absorption with chemical reaction
✅ The correct answer is option D.
7427. Air at a particular humidity is heated in a furnace. The new dew point
Decreases
Increases
Depends on the extent of heating
Remain unchanged
✅ The correct answer is option B.
7428. In case of an ideal solution, the total vapor pressure varies __________ with the composition expressed as mole fraction,
Inversely
Linearly
Exponentially
None of these
✅ The correct answer is option B.
7429. Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the
Mass transfer co-efficient
Thermal diffusivity
Kinematic viscosity
Volumetric diffusivity
✅ The correct answer is option A.
7430. The solvent used in liquid-liquid extraction should have __________ less than one.
Selectivity
Distribution co-efficient
Both A & B
Neither A nor B
✅ The correct answer is option D.