SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A local water quality standard for a particular metal is 100 ppm. Which of the following describes what 100 ppm means?
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1/1, 000, 000
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10/1, 000, 000
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100/1, 000, 000
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1, 000/1, 000, 000
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Explanation:
Detailed explanation-1: -This is an abbreviation for “parts per million” and it also can be expressed as milligrams per liter (mg/L). This measurement is the mass of a chemical or contaminate per unit volume of water.
Detailed explanation-2: -For example, a 1000 ppm solution is used to prepare a 100 ppm solution and then the 100 ppm solution is used to prepare a 1 ppm solution.
Detailed explanation-3: -Parts per million and parts per billion may be converted from one to the other using this relationship: 1 part per million = 1, 000 parts per billion. For water, 1 ppm = approximately 1 mg/L (also written as mg/l) of contaminant in water, and 1 ppb = 1 ug/L (also written as ug/l).
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