Chemical Engineering - Mass Transfer

11. 

Equilibrium-moisture curves of different solids

A. are different
B. are same
C. depend on the humidity of the gas
D. none of these

Answer: Option A

Explanation:

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12. 

Azeotropism for ethyl alcohol-water system disappears by

A. increasing temperature
B. decreasing pressure
C. increasing pressure
D. no means

Answer: Option B

Explanation:

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13. 

Degree of freedom for leaching and solvent extraction process is

A. 1
B. 3
C. 0
D. 2

Answer: Option B

Explanation:

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14. 

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

A. mass transfer co-efficient.
B. thermal diffusivity.
C. kinematic viscosity.
D. volumetric diffusivity.

Answer: Option A

Explanation:

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15. 

Equilibrium moisture of a solid is equal to the total moisture minus free moisture. Which of the following substances will have maxi-mum equilibrium moisture ?

A. Anthracite coal
B. Rag paper
C. Bamboo
D. Inorganic solids

Answer: Option C

Explanation:

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