AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
NaCl and Na₂SO₄ belong to the family of sodium salts (same positive radical). NaCl and KCl belong to the family of chloride salts (same negative radical).
Source: Chapter 2, Section 2.4.1 Family of Salts
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The key concept is that salts sharing the same positive radical (cation) form one family, and those sharing the same negative radical (anion) form another. Examiners expect both families to be correctly named in one answer. The textbook uses these exact examples, so reproduce the terminology precisely.