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JEE Main201912 Jan 2019Evening ShiftChemistryGeneral Principles and Processes of Isolation of MetalsActual

The pair that does not require calcination is

Options

  1. AZnO and Fe 2 O 3 . xH 2 O
  2. BZnO and MgO
  3. CZnCO 3 and CaO
  4. DFe 2 O 3 and CaCO 3 . MgCO 3

Correct answer

B. ZnO and MgO

Step-by-step solution

Calcination is required for hydroxide carbonate and hydrated ores. So, calcination for ZnO and MgO will not occur.

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