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: We know that the vapour pressure of water is the 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 answer:
So in the question it is asked to comment on the statement given, whether the given statement is true or not. The statement given here is about aqueous tension parameter.It is stated that the aqueous tension in a system is the vapour pressure of water and it only depends on the temperature of the system.
We are very familiar from the lower classes with the definition pressure, partial pressure of a system and with the factors that affect the parameter.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 vapourization 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.’

Therefore the correct answer for the given question is option (A).

Note:
Students sometimes get confused between the parameters surface tension and aqueous tension. Surface tension is the property of the surface of the liquids to shrink to minimum surface area. Do not consider that partial pressure depends on parameters other than temperatures as normal pressure does.