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Acids, Bases and Salts — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceAcids, Bases and Salts1 Mark
Question
A salt whose aqueous solution will have a pH of more than 7 will be:
  1. K2CO3
  2. K2SO4
  3. NaCl
  4. NH4Cl
✓

Answer

  1. K2CO3

Explanation:

K2CO3 is formed from a weak acid, carbonic acid (H2CO3), and a strong base, potassium hydroxide (KOH). On hydrolysis, K2CO3 forms more OH- ions than H+ ions. Thus, it is basic, with a pH more than 7.

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