COMEDK2021ChemistrySurface Chemistry
Which of the following conditions are favourable for chemisorption?
Options
- ALow temperature and high pressure
- BHigh temperature and low pressure
- CHigh temperature and high pressure
- DLow temperature and low pressure
Correct answer
C. High temperature and high pressure
Step-by-step 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 pressur