Stoichiometry MCQ Questions & Answers

21

The average translational kinetic energy with which a gas molecule is endowed is dependent on its

A) Nature B) Size C) Absolute temperature D) All of the above

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Answer & Solution

Answer: Option C

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22

Concentration of a solution expressed in terms of __________ is independent of temperature.

A) Molarity B) Normality C) Molality D) None of these

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Answer & Solution

Answer: Option C

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23

Sometimes, in chemical processes, a part of the outlet stream is rejected as waste in order to keep the impurity level in the system within limits. This phenomenon is termed as the

A) Recycling B) Purging C) Bypassing D) Recirculation

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Answer & Solution

Answer: Option B

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24

Which of the following gases is the most soluble in water?

A) NH₃ B) CO₂ C) H₂S D) CH₄

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Answer & Solution

Answer: Option A

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25

Pick out the wrong statement:

A) Clausius-Clapeyron equation relates the latent heat of vaporisation to the slope of the vapor pressure curve B) At the boiling point of liquid at the prevailing total pressure, saturated absolute humidity is infinite C) Percentage saturation and relative saturation are numerically equal for an unsaturated vapor gas mixture D) Clapeyron equation is given by, $$\frac{{{\text{dP}}}}{{{\text{dT}}}} = \frac{\lambda }{{{\text{T}}\left( {{{\text{V}}_{\text{G}}} - {{\text{V}}_{\text{L}}}} \right)}};$$ where, P = vapor pressure, T = absolute temperature, $$\lambda $$ = latent heat of vaporisation, V_G and V_L = volumes of gas and liquid respectively

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Answer & Solution

Answer: Option C

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26

Internal energy of a substance comprises of the __________ energy.

A) Vibrational B) Rotational C) Translational D) All of the above

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Answer & Solution

Answer: Option D

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27

At a constant volume, for a fixed number of moles of a gas, the pressure of the gas increases with rise of temperature due to

A) Decrease in mean free path B) Increased collision rate among molecules C) Increase in molecular attraction D) Increase in average molecular speed

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Answer & Solution

Answer: Option C

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28

Which of the following is insensitive to changes in pressure?

A) Heat of vaporisation B) Melting point C) Heat of fusion D) Both B & C

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Answer & Solution

Answer: Option D

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29

Number of gram equivalent of solute dissolved in one litre of solution is called its

A) Normally B) Molarity C) Molality D) Formality

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Answer & Solution

Answer: Option A

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30

1 kg of calcium carbide (CaC₂) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour?

A) 5 B) 10 C) 15 D) 20

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Answer & Solution

Answer: Option B

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Stoichiometry MCQ Questions & Answers | Chemical Engineering