TN TET 2013 Paper 2 Math and Science Paper

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Question : 115 of 150

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

2Cu + 4HCI + O₂ → 2CuCl₂ + 2H₂O
3Fe + 2O₂ → Fe₃O₄
MgCO₃ → MgO + CO₂
2ZnS + 3O₂ → 2ZnO + 2SO₂

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