Question

Aqueous tension is dependent on:
A) Volume
B) Pressure
C) Temperature
D) Weight of gas

Answer 1

Hint: It is a physical quantity that measures the coldness or warmth of an object with reference to the standard value. It is the source of the flow of energy, occurrence of heat. It is the most important quantity and aqueous tension is directly dependent on it.

Complete answer:
Aqueous tension is the pressure of saturated vapours present in the moist gas. The pressure that is exerted by the moist gas is the sum of partial pressure of water vapour and partial pressure of a dry gas. Due to this condition, aqueous tension arises. Gas becomes moist due to the presence of water vapour (small quantity) that is caused by evaporation.
Aqueous tension is definite and specific for each temperature. It is dependent on temperature and independent on volume and pressure. Aqueous tension is constant at given temperature but when temperature increases, aqueous tension also increases. So, aqueous tension is directly proportional to the temperature.

Thus, the correct answer is option C. i.e., temperature.

Additional Information: Volume does not have any impact on the aqueous tension because as volume changes, the rate of evaporation does not change.

Note: Aqueous tension and surface tension both are different. Actually, aqueous tension is the partial pressure of the water vapour. Surface tension is not a pressure but the energy that is required to increase the surface of liquid due to intermolecular forces.