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An insoluble solid that separates from a solution during a chemical reaction is called:
A{'text': 'A catalyst'}
B{'text': 'An effervescence'}
C{'text': 'A precipitate'}
D{'text': 'A residue of evaporation'}
Answer & Solution
Correct answer: C. {'text': 'A precipitate'}
1. When two soluble salts react they sometimes form one product that is insoluble.
2. The insoluble product settles down and is called a **precipitate**.
3. Example: AgNO₃ + NaCl → AgCl↓ + NaNO₃ (white AgCl precipitate).
4. Effervescence describes gas escape, and residue of evaporation is left after the solvent dries.
_Source: Selina Concise ICSE Class 8 Chemistry Ch 6 "Chemical Reactions", Signs of chemical change_
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