Assertion The concentration of pollutants in water or atmosphere is often expressed in terms of ppm. Reason Concentration in parts per million can be expressed as mass to mass, volume to volume and mass to volume

Question

Accepted Answer

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion. The assertion is true because pollutants in water and air are usually present in very small amounts, so ppm is a convenient unit. The reason is also true, and it explains the assertion: ppm can be written as mass/mass, volume/volume, or mass/volume, making it broadly applicable to different kinds of mixtures.

Assertion The concentration of pollutants in water or atmosphere is often expressed in terms of ppm. Reason Concentration in parts per million can be expressed as mass to mass, volume to volume and mass to volume

Solution

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