Q60 / 180 · COMEDK 2021 · Chemistry
Which of the following conditions are favourable for chemisorption?
- ALow temperature and high pressure
- BHigh temperature and low pressure
- Correct answerCHigh temperature and high pressure
- DLow temperature and low pressure
Solution
Chemisorption involves formation of strong chemical bonds between adsorbate and adsorbent.
Temperature: Since bond formation requires activation energy, high temperature provides the necessary energy to overcome the activation energy barrier. Hence high temperature is favourable.
Pressure: High pressure increases collision frequency of gas molecules with the surface, leading to greater extent of adsorption. Hence high pressure is favourable.
Favourable conditions for chemisorption: high temperature and high pressure.
Temperature: Since bond formation requires activation energy, high temperature provides the necessary energy to overcome the activation energy barrier. Hence high temperature is favourable.
Pressure: High pressure increases collision frequency of gas molecules with the surface, leading to greater extent of adsorption. Hence high pressure is favourable.
Favourable conditions for chemisorption: high temperature and high pressure.
Hence, the correct answer is option: 'C'.