Home Chemistry Hydrogen and Its Compounds ( Not in Syllabus ) Water or Hydride of Oxygen Which of the following ions will cause hardn…
Chemistry Hydrogen and Its Compounds ( Not in Syllabus ) Water or Hydride of Oxygen Single Correct MCQ
Published on: August 13, 2026

Which of the following ions will cause hardness in water sample?

A
B
C
D

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The correct answer is:
A

: Presence of calcium and magnesium salts in the form of hydrogenarbonate, chloride and sulphate in water makes water ‘hard’.

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