SECTION - B
15. What is a redox reaction? Identify the substance oxidised and the substance reduced in the following
reactions:
(a) PbO+C-→ Pb + CO.
(b) MnO2 + 4HC1 —— MnCl2 + 2H2O + Cl2.
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( From PbO to Pb ) . 2. C is oxidised (From C to CO2 ) . In the reaction MnO2 + 4HCl -> MnCl2 + Cl2 + 2H2O , Cl (chlorine) is the substance which is oxidized from the HCl, and it is the reducing agent for the MnO2 as well.
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In a chemical reaction when oxidation and reduction take place simultaneously then it is a redox reaction
a)Pb is reduced and C is oxidized
b)Mn is reduced and H is oxidized
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