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Find the number of reaction from the given reaction which can show calcination process : (i) `CaCO_(3).MgCO_(3) overset (Delta) rarr CaO + MgO + CO_(2)` (ii) `CuCO_(3).Cu(OH)_(2) overset (Delta) rarr 2CuO + H_(2)O + CO_(2)` (iii) `Al_(2)O_(3). 2H_(2)O overset (Delta) rarr Al_(2)O_(3) + 2H_(2)O` (iv) `2Cu_(2)S + 3O_(2) overset (Delta) rarr 2Cu_(2) O + 2SO_(2)`. |
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Answer» Correct Answer - `(3)` Calcination is heating the ore strongly in absence of `O_(2)` or air. Reactions (i),(ii), and (iii) are calcination reactions. |
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