NEET 2025

NEET 2025 Chemistry question on Practical Chemistry

Which one of the following reactions does NOT belong to "Lassaigne's test"?
  1. A.
    2CuO+C⟶2Cu+CO22\text{CuO} + \text{C} \longrightarrow 2\text{Cu} + \text{CO}_2
  2. B.
    Na+C+N⟶NaCN\text{Na} + \text{C} + \text{N} \longrightarrow \text{NaCN}
  3. C.
    2Na+S⟶Na2S2\text{Na} + \text{S} \longrightarrow \text{Na}_2\text{S}
  4. D.
    Na+X⟶NaX\text{Na} + \text{X} \longrightarrow \text{NaX}
Show answer

Correct option: A

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