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Adding detergents to water helps in remo...

Adding detergents to water helps in removing dirty greasy stains.This is because (I) It increases the oil-water surface tensionn. (II) It decreases the oil-water surface tensionm.(III) Viscosity of oil is high (IV) Dirt is held suspended surrounded by detergent molecules

A

2 and 4

B

1 only

C

3 and 4

D

4 only

Text Solution

Verified by Experts

The correct Answer is:
A
Soap solution has less surface tension than ordinary water, therefore spreads over large surface area with more wetting power. On account of this properly that soap solution can penetrate and clean the clothes better than ordinary water.
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