Q1. What type of adsorption is characterized by the formation of a chemical bond? (2019)
Solution:
Chemisorption is characterized by the formation of a chemical bond between the adsorbate and the surface.
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Q2. What is the effect of temperature on chemisorption? (2023)
Solution:
Chemisorption typically decreases with an increase in temperature because it involves the formation of stronger chemical bonds, which are less favorable at higher thermal energies.
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Q3. What is the Tyndall effect? (2023)
Solution:
The Tyndall effect is the scattering of light by colloidal particles, making the path of the light visible.
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Q4. Which of the following methods is used to stabilize colloidal solutions? (2023)
Solution:
Electrophoresis is used to stabilize colloidal solutions by applying an electric field to separate charged particles.
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Q5. The Langmuir isotherm assumes that adsorption occurs at specific sites on the surface. What does this imply? (2020)
Solution:
The Langmuir isotherm assumes that adsorption occurs at specific sites, leading to a monolayer coverage of the adsorbate.
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Q6. What is the term for the energy required to separate an adsorbate from an adsorbent? (2023)
Solution:
Desorption energy is the energy required to separate an adsorbate from an adsorbent.
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Q7. What is the primary process involved in adsorption? (2023)
Solution:
Adsorption primarily involves physical attraction between the adsorbate and the surface of the adsorbent.
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Q8. Which factor does NOT affect the rate of adsorption? (2023)
Solution:
The color of the adsorbent does not affect the rate of adsorption, while temperature, surface area, and concentration do.
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Q9. What is the effect of increasing temperature on chemisorption? (2022)
Solution:
Chemisorption is an exothermic process, and increasing temperature generally decreases the extent of chemisorption.
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Q10. Which of the following statements is true about adsorption isotherms? (2023)
Solution:
Adsorption isotherms illustrate how the amount of adsorbate on a solid surface varies with pressure at a constant temperature.
