Question

DEFINE AQUEOUS TENSION

Answer 1

Dear student,
It is the partial pressure of the water vapour present in the moist gas ( having some content of water).
Pressure exerted by moist gas = Partial pressure of dry vapour + partial pressure of moist vapour.

This partial pressure exerted by water vapours = aqueous tension.
During evaporation, gas becomes moist due to the presence of water vapour in a small amount.
A gas can also become moist when we are collecting the gas over water.
Aqueous tension value increases with the increase in temperature.

Regards.