What do you understand by ppm?

Parts per million

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Particles per million

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Parts and particles per million

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None of the above

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Solution

The correct option is B Parts per million
Parts per million or ppm means out of a million. Usually describes the concentration of something in water or soil. One ppm is equivalent to 1 milligram of something per litre of water (mg/l) or 1 milligram of something per kilogram soil (mg/kg).

Therefore, the correct answer is option A.

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