Mass Transfer - Study Mode

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[#221] Pick out the system with minimum boiling azeotrope at 1 atm.

(A) Benzene-toluene

(B) Ethyl alcohol-water

(C) Hydrochloric acid-water

(D) All of the above

Correct Answer

(B) Ethyl alcohol-water

[#222] Pick out the wrong statement. Raoult's law does not apply, when the

(A) Size of component molecules are not equal

(B) Attractive forces between like and unlike molecules in the solution are approximately equal

(C) Component molecules are nonpolar

(D) Chemical combination or molecular association between unlike molecules takes place in the formation of solution

Correct Answer

[#223] __________ equation applies to diffusivities in liquids.

(A) Gilliland

(B) Hirschfelder

(C) Wilke and Chang

(D) None of these

Correct Answer

(A) Gilliland

[#224] Pick out the wrong statement:

Correct Answer

(B) In case of a stripper, the equilibrium curve is always below the operating line
(H) The equilibrium moisture content of the solid can be reduced by increasing the absolute humidity
(L) Fenske-Underwood equation is used for calculating theoretical number of plates in a distillation column at normal operating reflux condition

[#225] What is the degree of freedom of an absorption process in which only one component is transferred between phases?

(A) 3

(B) 2

(C) 4

(D) 1

Correct Answer

(A) 3