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Acids, Bases and Salts — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceAcids, Bases and Salts1 Mark
Question
The salt whose aqueous solution will have no effect on either red litmus or blue litmus is:
  1. Potassium sulphate.
  2. Sodium carbonate.
  3. Ammonium sulphate.
  4. Sodium acetate.
✓

Answer

  1. Potassium sulphate.

Explanation:

Potassium sulphate (K2SO4) is formed from a strong acid, sulphuric acid (H2SO4), and a strong base, potassium hydroxide (KOH). On dissolving in water, K2SO4 hydrolyses to form equal amounts of H+ and OH- ions. As the salt solution of K2SO4is neutral, it has no effect on red or blue litmus paper.

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