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  9. Q15

HPPSC HPAS 2019 · Question 15 of 100

Which one of the following substances is not responsible for water hardness?

General Science

  1. ACalcium carbonate
  2. BMagnesium carbonate
  3. CCalcium nitrateCorrect
  4. DCalcium hydrogen nitrate

Answer: C. Calcium nitrate

Explanation

Per the official key, calcium nitrate is the listed substance not responsible for water hardness.

Source: HPPSC HPAS (Pre) 2019 GS Paper-I (theexampillar.com official answer key)

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