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Acids, Bases and Salts — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10ScienceAcids, Bases and Salts1 Mark
MCQ
The salt whose aqueous solution will have no effect on either red litmus or blue litmus is:
  • ✓
    Potassium sulphate.
  • B
    Sodium carbonate.
  • C
    Ammonium sulphate.
  • D
    Sodium acetate.
✓

Answer

Correct option: A.
Potassium sulphate.
Potassium sulphate $(K_2SO_4)$ is formed from a strong acid, sulphuric acid $(H_2SO_4)$, and a strong base, potassium hydroxide $(KOH)$. On dissolving in water, $K_2SO_4$ hydrolyses to form equal amounts of $H^+$ and $OH^-$​​​​​​​ ions. As the salt solution of $K_2SO_4i$s neutral, it has no effect on red or blue litmus paper.

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