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KVPY2017ChemistryHydrogen

When heated in air, brown copper powder turns black. This black powder would turn brown again when heated with

Options

  1. ACO
  2. BH ₂
  3. CO ₂
  4. DNH ₃

Correct answer

C. O ₂

Step-by-step solution

H ₂ is reducing agent. Copper reacts with O ₂ to give black colour CuO compound

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