Which of the following statements regarding surface tension is are true 1 Soaps and detergents incre...........

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Which of the following statements regarding surface tension is/are true?

1. Soaps and detergents increases the surface tension of water which leads to increase in the wetting power of water or its ability to detach dirt particles from clothes and utensils.

2. Mosquitoes breed on stagnant water. Their larvae keep floating on water due to surface tension. When oil is sprinkled on the stagnant water its surface tension is lowered resulting in the drowning and death of the larvae.

Select the correct answer from the codes given below

1 only

2 only

Both 1 and 2

None of the above

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Explanation:

The tension of the surface film of a liquid caused by the attraction of the particles in the surface layer by the bulk of the liquid, which tends to minimize surface area.
Soaps and detergents lowers the surface tension of water which leads to increase in the wetting power of water or its ability to detach dirt particles from clothes and utensils.