Which of the following statements is correct for chemisorption?

• A

  Chemisorption is reversible.
• B

  Multilayer adsorption takes place.
• Correct answer
  C

  Adsorption increases with temperature.
• D

  The heat of adsorption is generally less than $40 \mathrm{~kJ} \mathrm{~mol}^{-1}$.

Solution

In chemisorption, adsorption increases with temperature. Because the plot between $x / m$ and $T$ (temperature) is as follows. where, $x / m=$ mass fraction of chemisorption.

Hence, the correct answer is option: 'C'.