Question

When a small quantity of impurity which is
partially soluble, is added to water the surface tension of water
(a) Increases
(b) Decreases
(c) May increase or decrease
(d) None of the above

Answer 1

Answer:

a )) increase

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Answer 2

When a small quantity of impurity which is partially soluble is added to water the surface tension of the water (c) May increase or decrease.

About Surface tension:

• Surface tension is the propensity of liquid surfaces at rest to shrink to the smallest feasible surface area.
• Surface tension is what permits items with a higher density than water to float on a water surface without getting even partially immersed.
• Surface tension is defined as the force per unit length perpendicular to a line drawn on the liquid's surface.
• It has the SI unit newtons per meter and the CGS unit dynes per centimeter.

What happens when an impurity is added to a liquid:

• When contaminants are added to a liquid, its surface tension lowers.
• When soluble compounds are dissolved in water, the surface tension of the water is reduced.

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