Question

Aqueous tension is the vapour pressure of water and depends only upon temperature.
If the statement is true enter 1, else enter 0.
(A) 1
(B) 0
(C) Both A and B
(D) None of these

Answer 1

Hint: Vapour pressure of water is partial pressure of water vapours in a system. Partial pressure is the pressure of one component in a gaseous system of more than one component that is volatile or gaseous.

Complete step by step solution:
It is true that aqueous tension is the vapour pressure of water in any system.
Now, let’s see which parameters it depends on.
As aqueous tension is the partial vapour pressure of water present in the system, temperature changes alter the value of aqueous tension. Thus, the value of aqueous tension depends on temperature.
Now volume does not have any effect on it because as we will change volume, the rate of evaporation is not altered. Aqueous tension itself is a pressure parameter and hence we cannot see any changes with pressure in the values of aqueous tension.
Hence we can say that the statement given is true that ‘Aqueous tension is the vapour pressure of water and depends only upon temperature.’
- Here the given statement can be either true or can be false so option (C) and (D) are not correct.

Note: Do not consider the aqueous tension as surface tension of water as they sound alike, actually aqueous tension is the partial pressure. Do not consider that partial pressure depends on parameters other than temperatures as normal pressure does.