Stoichiometry MCQ Questions & Answers

71

pH value of H₂SO₄ (5% concentration) is

A) 5 B) 7 C) > 7 D) < 7

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Answer & Solution

Answer: Option D

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72

Pick out the wrong unit conversion of heat transfer co-efficient.

A) 1 kcal/m².hr.°C = 0.2048 BTU/ft².hr.°F. = 1.163 W/m².°K B) 1 kcal/m².hr.°K = 1.163 W/m².°C C) 1 W/m².°C = 0.1761 BTU/ft².hr.°F D) 1 BTU/ft².hr.°F = 4.88 kcal/m².hr.°C = 20.44 kJ/m².hr°C = 5.678 W/m².°C

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Answer & Solution

Answer: Option B

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73

Pick out the wrong unit conversion of mass transfer co-efficient.

A) 1 lb/hr.ft³.atm. = 4.8182 kg/hr.m².bar B) 1 kg/hr.m².atm= 0.98687 kg/hr.m.bar C) 1 lb/hr.ft² = 4.8823 kg/hr.m² D) 1 kg/hr.m² = 4.8823 lb/hr.ft²

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Answer & Solution

Answer: Option D

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74

With increase in the temperature of pure (distilled) water, its

A) POH decreases and pH increases B) POH and pH both 4ecreases C) PH and pOH both increases D) PH decreases and pOH increases

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Answer & Solution

Answer: Option B

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75

As per Kirchoff s equation, the heat of reaction is affected by the

A) Pressure B) Volume C) Temperature D) Molecularity

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Answer & Solution

Answer: Option C

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76

Size range of the colloidals particles is

A) 5 - 200 milli-microns B) 50 - 200 microns C) 500 - 1000 microns D) 10 - 50 Angstrom

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Answer & Solution

Answer: Option A

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77

In a binary liquid system, the composition expressed as __________ is independent of the temperature & pressure.

A) Kg of solute/kg of solvent B) Kg-mole of solute/kg-mole of solvent C) Kg-mole of solute/1000 kg of solvent D) All of the above

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Answer & Solution

Answer: Option D

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78

The atomic weight of helium is 4 times that of hydrogen. Its diffusion rate as compared to hydrogen will be __________ times.

A) $$\frac{1}{2}$$ B) 4 C) $$\sqrt 2 $$ D) $$\frac{1}{4}$$

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Answer: Option C

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79

Which of the following is followed by an ideal solution ?

A) Boyle's law B) Amgat's law C) Raoult's law D) Trouton's rule

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Answer & Solution

Answer: Option C

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80

According to Raoult's law, "The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component." Raoult's law is not applicable under the following assumption/condition.

A) No component is concentrated at the surface of the solution B) The component molecules are non polar and are of almost equal size C) In the formation of solution, chemical combination/molecular association between unlike molecules takes place D) The attractive forces between like and unlike molecules are almost equal

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Answer & Solution

Answer: Option C

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Stoichiometry MCQ Questions & Answers | Chemical Engineering