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In which two of the following equations (1,2,3 and 4) is the first reactant an oxidising agent? 1. Mg+2HClMgCl2+H2 2. Cr2O72+6Fe2++14H+2Cr3++6Fe3++7H2O 3. 2Cu2++4I2Cul+I2 4. H2SO3+2Fe3++H2OH2SO4+2Fe2++2H+

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In which two of the following equations (1,2,3 and 4) is the first reactant an oxidising agent? 1. Mg+2HClMgCl2+H2 2. Cr2O72+6Fe2++14H+2Cr3++6Fe3++7H2O 3. 2Cu2++4I2Cul+I2 4. H2SO3+2Fe3++H2OH2SO4+2Fe2++2H+ a. 1 and 2 b. 2 and 3 c. 3 and 4 d. 1 and 4 e. 2 and 4

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