Chemical Engineering - Stoichiometry

41. 

The activity co-efficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour

A. measures the elevation in boiling point.
B. is not dependent on the temperature.
C. is a function of the liquid phase composition.
D. measures the depression in freezing point.

Answer: Option C

Explanation:

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42. 

Osmotic pressure of a dilute solution of a non volatile solute in a solvent obeying Raoult's law is proportional to the

A. temperature.
B. volume of solution.
C. moles of non-volatile solute.
D. none of these.

Answer: Option A

Explanation:

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43. 

In case of an unsaturated vapor-gas mixture, the humid volume increases with increase in the

A. total pressure.
B. absolute humidity at a given temperature.
C. both (a) and (b).
D. neither (a) nor (b).

Answer: Option C

Explanation:

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44. 

Which of the following is an exothermic reaction ?

A. Conversion of graphite to diamond
B. Decomposition of water
C. Dehydrogenation of ethane to ethylene
D. none of these

Answer: Option D

Explanation:

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45. 

Heat of solution in a system in which both solute and solvent are liquids is termed as

A. heat of solvation.
B. heat of hydration.
C. standard integral heat of solution.
D. heat of mixing.

Answer: Option D

Explanation:

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