Comparison of Physisorption and Chemisorption

Q. The given graphs I, II, III and IV represent the general trends observed for different physisorption and chemisorption processes under mild conditions of temperature and pressure. Which of the following choice(s) about I, II, III and IV is/are correct?

1. I is physisorption and III is chemisorption.
2. I is physisorption and II is chemisorption.
3. IV is chemisorption and III is physisorption.
4. IV is chemisorption and III is chemisorption.

Q.

Which statement is/are correct?

i) Physical adsorption is due to Vander Waal's forces

ii) Physical adsorption decreases at high temperature

iii) Physical adsorption is irreversible

iv) Enthalpy for a chemical adsorption is generally lesser than that of physical adsorption

1. i, ii &iv

2. i, ii & iii

3. i, ii

4. i&iv

Q.

Adsorption is multilayered in the case of [MP PET 1999]

1. Physical adsorption

2. Chemisorption

3. Both

4. None of both

Q. From the following statements, which is/are correct?

1. Physical adsorption is multilayer and non specific
2. Chemical adsorption is generally monolayer and reversible in nature
3. Physical adsorption is due to free valence electrons of atoms
4. Chemical adsorption is stronger than physical adsorption and occurs at high temperature

Q. Although nitrogen does not adsorb on iron surface at room temperature, it adsorbs on the same surface at 83 K. Which one of the following statement is correct?

1. At 83 K, there is formation of monomolecular layer
2. At 83 K, there is formation of multimoleular layer
3. At 83 K, nitrogen molecules are held by chemical bonds
4. At 83 K, nitrogen is adsorbed as atoms

Q. The given graphs I, II, III and IV represent the general trends observed for different physisorption and chemisorption processes under mild conditions of temperature and pressure. Which of the following choice(s) about I, II, III and IV is/are correct?

1. I is physisorption and III is chemisorption.
2. I is physisorption and II is chemisorption.
3. IV is chemisorption and III is physisorption.
4. IV is chemisorption and III is chemisorption.