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Question

Why is it not possible to remove stains with water alone?
  1. All of these
  2. Water forms a precipitate with the stains and sticks to the clothes.
  3. Water is a non polar solvent and hence can not remove the stains.
  4. Most stains are oily in nature.


Solution

The correct option is D 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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