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Which of the following is known as fusion mixture?

1. Mixture of Na2CO3 + NaHCO3
2. Na2CO3·10H2O
3. Mixture of K2CO3 + Na2CO3
4. NaHCO3

Correct answer: Mixture of K2CO3 + Na2CO3

Solution

Fusion mixture is a combination of potassium carbonate (K2CO3) and sodium carbonate (Na2CO3), used in qualitative analysis to fuse samples for testing acidic radicals.

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