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Question

What do you understand by ppm?

A
Parts per million
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B
Particles per million
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C
Parts and particles per million
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D
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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