Chemical Engineering - Stoichiometry

36. 

A solution is made by dissolving 1 kilo mole of solute in 2000 kg of solvent. The molality of the solution is

A. 2
B. 1
C. 0.5
D. 0.5

Answer: Option C

Explanation:

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37. 

Average molecular weight of air is about

A. 21
B. 29
C. 23
D. 79

Answer: Option B

Explanation:

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38. 

6 gms of magnesium (atomic weight = 24), reacts with excess of an acid, the amount of H2 produced will be __________ gm.

A. 0.5
B. 1
C. 3
D. 5

Answer: Option A

Explanation:

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39. 

Pick out the wrong unit conversion of calorific value.

A. 1 kcal/kg = 1.8 BTU/lb = 4.186 kJ/kg.
B. 1 BTU/ft3 = 8.9 kcal/m3 = 0.038 MJ/m3.
C. 1 BTU/lb = 2.3 kcal/kg.
D. 1 kcal/m3 = 0.1124 BTU/ft3.

Answer: Option C

Explanation:

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40. 

Increasing the temperature of an aqueous solution will cause decrease in its

A. molality
B. mole fraction
C. weight percent
D. molarity

Answer: Option D

Explanation:

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