Question

Which of the following is correct for chemical adsorption?

• A. Increases with an increase in temperature
• B. Decreases with an increase in temperature
• C. First increases, then decreases with an increase in temperature
• D. First decreases, then increases with an increase in temperature

Answer 1

The correct option is C First increases, then decreases with an increase in temperature

With an increase in temperature, chemical adsorption increases intially because this provides the necessary activation energy to form bonds. After a certain point, chemical adsorption starts decreasing, an increase in temperature causes desorption. Hence, the correct option is (c).