ANS:A - aqueous tension.

"Aqueous tension" is not a commonly used term in the context of gases collected over water. However, "aqueous tension" may refer to the force or attraction between water molecules at the surface of the water. This force arises due to the cohesive properties of water molecules, which tend to attract each other. In the context of gases collected over water, the term "aqueous tension" might be used to describe the force exerted by the water molecules at the surface of the water, which can affect the behavior of gases dissolved or in contact with the water. However, in scientific terminology, this concept is more commonly referred to as "surface tension" rather than "aqueous tension." Therefore, "aqueous tension" is not a widely recognized term, and its meaning may vary depending on the context in which it is used.