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Question 600065
JEE Chemistry · Hard

Mole Concept and Stoichiometry: Concentration Calculations MCQ

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Concentration CalculationsHardQuestion 600065

Question

The ppm concentration means:
  1. A
    mg of solute per L of solution
  2. B
    mg of solute per kg of solution (parts per million by mass)
  3. C
    μg per mL
  4. D
    All of the above depending on context
    Correct

Correct answer

All of the above depending on context

Explanation

ppm (parts per million) can be expressed as mg/L (for aqueous solutions, since 1 L ≈ 1 kg), mg/kg (by mass), or μg/g. For dilute aqueous solutions all three are essentially equivalent. Context determines which is used.

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