Question

Select the correct statement(s).
1. Adsorption is spontaneous at all the temperatures.
2. Gases having high critical temperature possess more tendency for adsorption.
3. An adsorbent possesses more tendency for adsorption if it is in colloidal state.
4. Chemical adsorption first decreases with increase in temperature and then increases.
5. Water molecules are adsorbed in $CaC{l}_2\left(s\right)$ results in increasing temperature.

• A. $1,2,3,4,5$
• B. $2,3,4$
• C. $1,2,3,4$
• D. $2,3$

Answer 1

The correct option is D $2,3$

Adsorption is spontaneous at low the temperatures. At high temperatures, it becomes non spontaneous.

Gases having high critical temperature are easily liquefiable due to higher forces of attractions among molecules and thus, possess more tendency for adsorption.

An adsorbent possesses more tendency for adsorption if it is in colloidal state. In colloidal state, the surface area is very high. This increases the tendency for absorption.

Chemical adsorption first increases with increase in temperature and then decreases.

Water molecules are absorbed in $CaC{l}_2\left(s\right)$. This is accompanied by decrease in temperature.