This set of Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Liquids and Solids in Equilibrium with Solids”.
1. In Langmuir’s model of adsorption of a gas on a solid surface the mass of gas striking a given area of surface is ______________to the pressure of the gas.
a) Proportional
b) Anti proportional
c) Independent
d) None of the mentioned
View Answer
Explanation: In Langmuir’s model of adsorption of a gas on a solid surface the mass of gas striking a given area of surface is proportional to the pressure of the gas.
2. Physical adsorption increase with _________ in temperature.
a) Increase
b) Decrease
c) Neither increase nor decrease
d) None of the mentioned
View Answer
Explanation: Physical adsorption increase with decrease in temperature.
3. The physical process that occurs when gas or liquid molecules are brought into contact with a solid surface and condense on the surface
a) Absorption
b) Adsorption
c) Both Adsorption and Absorption
d) None of the mentioned
View Answer
Explanation: Adsorption is the physical process that occurs when gas or liquid molecules are brought into contact with a solid surface and condense on the surface.
4. Adsorbent is a solid surface on which gas or liquid molecules condense to form a film.
The above given statement is
a) Correct
b) Incorrect
c) Partially correct
d) None of the mentioned
View Answer
Explanation: Adsorbent is a solid surface on which gas or liquid molecules condense to form a film.
5. Adsorption when interaction between the solid and the condensed molecules is relatively strong as contrasted with physical adsorption.
a) Absorption
b) Adsorption
c) Chemisorption
d) None of the mentioned
View Answer
Explanation: “Chemisorption is the adsorption when interaction between the solid and the condensed molecules is relatively strong as contrasted with physical adsorption.
6. The gas molecules are held on solid surface by _________ in physical adsorption.
a) Chemical forces
b) Gravitational forces
c) Electrostatic forces
d) Vander Waal’s forces
View Answer
Explanation: Chemisorption is the adsorption when interaction between the solid and the condensed molecules is relatively strong as contrasted with physical adsorption.
7. The extent of adsorption of a gas on a solid depend on
a) Nature of gas
b) Pressure of gas
c) Temperature of the system
d) All of the mentioned
View Answer
Explanation: The extent of adsorption of a gas on a solid depend on all three nature of gas, pressure of gas and temperature of the system.
8. Which of the following gases is adsorbed by charcoal?
a) NH3
b) H2
c) N2
d) CO2
View Answer
Explanation: NH3 is easily liquefiable and highly water soluble gas.
9. Langmuir isotherm Mathematical relation for ___________ that takes place at equilibrium.
a) Absorption
b) Adsorption
c) Both Adsorption and Absorption
d) None of the mentioned
View Answer
Explanation: Langmuir isotherm Mathematical relation for adsorption that takes place at equilibrium.
10. Adsorption process must be
a) Endoethrgic
b) Endothermic
c) Exothermic
d) None
View Answer
Explanation: Adsorption process is an Exothermic process.
Sanfoundry Global Education & Learning Series – Chemical Process Calculation.
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