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BITSAT2017ChemistryGeneral Principles and Processes of Isolation of MetalsActual

Which of the following reactions is an example of calcination process?

Options

  1. A2 Ag + 2 HCl + O ⟶ 2 AgCl + H 2 O
  2. B2 Zn + O 2 ⟶ 2 ZnO
  3. C2 ZnS + 3 O 2 ⟶ 2 ZnO + 2 SO 2
  4. DMgCO 3 ⟶ Δ MgO + CO 2

Correct answer

D. MgCO 3 ⟶ Δ MgO + CO 2

Step-by-step solution

The process of conversion of a concentrated ore into its oxide by heating in absence of or in limited supply of air is called calcination. It is usually done for hydroxide, hydrated oxides and carbonate ores. MgCO 3 ⟶ Δ MgO + CO 2 g

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