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Question 35024
NEET Chemistry · Hard

Hydrogen: Water treatment MCQ

Solve this quality-checked NEET multiple-choice question, then review the correct answer and explanation.

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Water treatmentHardQuestion 35024

Question

Calgon method removes hardness using:

  1. A
    sodium hexametaphosphate
    Correct
  2. B
    alum
  3. C
    bleaching powder
  4. D
    hydrogen peroxide

Correct answer

sodium hexametaphosphate

Explanation

Calgon complexes Ca2+^{2+} and Mg2+^{2+} ions.

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