NEET levelSingle correct optionDifficulty 1 of 3sc004
Which of the following statements about chemisorption is correct?
AIt is non-specific and forms multilayers readily
BIt is highly specific and usually confined to a unimolecular layer
CIt is easily reversed by lowering the temperature
DIts enthalpy of adsorption is only about 20 to 40kJmol−1
Answer: B
Chemisorption forms chemical bonds at particular sites, so it is specific and limited to a monolayer. It is irreversible in general and has a high enthalpy of adsorption.