Question

Extent of adsorption of adsorbate from solution phase increases with:
(A) increase in amount of adsorbate in solution
(B) decrease in surface area of adsorbent
(C) increase in temperature of solution
(D) decrease in amount of adsorbate in solution

Answer 1

We know that there are many factors on which the adsorption depends. There are some factors which increase the adsorption and some factors decrease the adsorption.

Complete step by step solution:
We know that adsorption is defined as the deposition of molecular species onto the surface. The molecular species that gets adsorbed on the surface is known as adsorbate and the surface on which adsorption occurs is known as adsorbent. Some examples of adsorbents are clay, silica gel, colloids, metals etc.
And adsorbate is a substance that is absorbed (for example: if a gas is absorbed by a solid, the gas therefore becomes the adsorbate), where as an adsorbent is a substance that absorbs another substance (for example: silica gel). The difference is coating of deposition of the first substance over another.
So, we can say that as the amount of adsorbate in the solution increases interaction of adsorbate with adsorbent increase which led to increase in extent of adsorption.

So, from the above explanation we can say the correct answer is “A”.

Note: You should know that absorption and adsorption are two different phenomenons. There are some factors which affect the adsorption: Nature of adsorbent, surface area, nature of adsorbate, pressure, temperature.