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NTA Abhyas JEE Main2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice

The pair that does not require calcination is

Options

  1. AZ n O and M g O
  2. BF e 2 O 3 and CaC O 3 . MgC O 3
  3. CZ n O and F e 2 O 3 . x H 2 O
  4. DZnC O 3 and C a O

Correct answer

A. Z n O and M g O

Step-by-step solution

Calcination is required for carbonate and hydrated oxide ores. Z n O and M g O both are oxides, so they donot require calcination.

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