Chemistry NCERT Exemplar Solutions Class 12th Chapter Five

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Ans: Correct option is (i)

When the reactant and catalyst are in different phase it is known as heterogeneous catalysis hence the answer is (i).

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Ans: Correct option is (iv)

Lesser the value of critical temperature of gases, the lesser will be the force of attraction among molecules and least will be the adsorption hence the answer is option (iv).

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Ans: Correct option is (iii)

In absorption, a substance is uniformly distributed, through the body of the solid or liquid, hence the correct option is (iii).

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Ans: Correct option is (i)

Physisorption adsorbent does not show specificity for any particular gas because it is involved van there Waals forces are universal, hence the correct option is (i).

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Ans: Correct option is (ii)

On increasing the temperature activation energy of the adsorbate molecule increases which convert physical adsorption into chemisorptions hence the correct option is (ii).

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Ans: Correct option is (i)

High temperature is not favourable for physical adsorption since it is an exothermic process, hence the correct option is (i).

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Ans:  Correct option is (i)

As adsorption is an exothermic process so? H cannot be greater than zero, hence the correct option is (i).

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Ans: Correct option is (i)

Extent of adsorption depends on the concentration of the solute in a solution. The concentration of adsorbate increases the interaction between adsorbate and adsorbent thus the extent of adsorption also increases; hence the correct option is (i).

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Ans: Correct option is (ii)

As the process of adsorption is an exothermic one; physical adsorption occurs readily at low temperature and decreases with an increase in the temperature as equilibrium shifts in the backward direction. This is known as Le-Chatelier's principle, hence the correct option is (ii).

This is a Multiple Choice Type Questions as classified in NCERT Exemplar

Ans: Correct option is (iii)

When both adsorption and absorption occur simultaneously it is known as sorption; hence the correct option is (iii).