Stoichiometry MCQ Questions & Answers

81

The molecular velocity of a real gas is proportional to (where, T = absolute temperature of the gas).

A) $$\sqrt {\text{T}} $$ B) T C) T² D) $$\frac{1}{{\sqrt {\text{T}} }}$$

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Answer & Solution

Answer: Option A

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82

With rise in pressure, the solubility of gases in solvent, at a fixed temperature

A) Increases B) Decreases C) Remains unchanged D) Decreases linearly

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Answer & Solution

Answer: Option A

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83

Total energy at a point comprises of __________ energy.

A) Potential & kinetic B) Pressure C) Internal D) All of the above

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Answer & Solution

Answer: Option D

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84

The reverse process of fractional crystallisation is called

A) Stripping B) Leaching C) Differential distillation D) Absorption

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Answer & Solution

Answer: Option B

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85

One micron is equal to

A) 10^-4 mm B) 10^-4 cm C) 10^-6 m D) Both B & C

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Answer & Solution

Answer: Option D

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86

One 'Therm' is equivalent to

A) 10⁵ BTU B) 10⁵ kcal C) 10⁹ BTU D) 10⁹ kcal

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Answer & Solution

Answer: Option A

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87

Refluxing of part of the distillate in a fractionating column is a 'recycling operation', aimed primarily at

A) Heat conservation B) Yield enhancement C) Product enrichment D) None of these

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Answer & Solution

Answer: Option C

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88

Isotopes are atoms having the same

A) Mass number B) Number of neutrons C) Atomic mass D) None of these

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Answer & Solution

Answer: Option D

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89

One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH₄ + 2O₂ → CO₂ + 2H₂O. Both the reactants and products are in gas phase. ΔH°₂₉₈ = -730 kJ/mole of methane. If the average specific heat of all the gases/vapour is 40 J/mole.K, the maximum temperature rise of the exhaust gases in °C would be approximately equal to

A) 1225 B) 1335 C) 1525 D) 1735

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Answer & Solution

Answer: Option D

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90

Pick out the wrong unit conversion.

A) 1 atm = 760 mm Hg = 29.92 inch Hg = 14.7 psi = 1.013 bar = 1.013 kgf/cm² B) 1 kPa = 100 bar C) 1 mm Hg = 1 torr = 133.3 Pa D) None of the above

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Answer & Solution

Answer: Option B

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Stoichiometry MCQ Questions & Answers | Chemical Engineering