Why don’t stains erase when washed with water alone?

Water is a non polar solvent and hence can not remove the stains.

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Most stains are oily in nature.

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Water forms a precipitate with the stains and sticks to the clothes.

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Solution

The correct option is B Most stains are oily in nature.
Most stains are oily in nature. Oil doesn’t dissolve in water as its molecules are non-polar while water is a polar solvent. Hence we need a chemical substance that attaches itself to the oil molecules and removes it from clothes.

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Similar questions

Why don’t stains get erased when washed with water alone?

The reddish brown stains when clothes are washed with hard water is due to :

enzyme is used to remove oily stains from clothes.

Which of the following enzymes is used to remove oily stains from the clothes?

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