A chemist mixes two colourless aqueous solutions X and Y. A white precipitate Z forms immediately. Later, analysis reveals that Z is insoluble calcium carbonate. Which pair of solutions is most likely suitable?
Subject: General Awareness | Topic: Science | Difficulty: MEDIUM
Options
- (A) NaCl and KNO₃
- (B) HCl and NaOH
- (C) Na₂CO₃ and CaCl₂
- (D) ZnSO₄ and FeCl₂
Verified Answer
Option (C): Na₂CO₃ and CaCl₂
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