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Acids, Bases and Salts — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceAcids, Bases and Salts1 Mark
Question
For question two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below:
  1. Both A and R are true, and R is correct explanation of the assertion.
  2. Both A and R are true, but R is not the correct explanation of the assertion.
  3. A is true, but R is false.
  4. A is false, but R is true.
Assertion: Strength of the acid or base decreases with dilution.
Reason: Ionization of an acid or a base increases with dilution.
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Answer

  1. Both A and R are true, but R is not the correct explanation of the assertion.

Explanation:

Ionization of an acid or a basic increases on dilution but concentration of H+ or OH- ions decreases per unit volume, thus strength of the acid or the base decreases with dilution.

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