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Question
Explain the term reduction in term of addition and removal of oxygen/hydrogen with a suitable example.
Solution
Reduction: Addition of hydrogen or removal of oxygen is called reduction.
\[\ce{CuO + H2->Cu + H2O}\]
Copper oxide is reduced to `"Cu"`
\[\ce{H2S + \underset{\text{Reduced}}{Cl2->2HCl} + S}\]
Chlorine is reduced, as addition of hydrogen.
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RELATED QUESTIONS
Which of the statements about the reaction below are incorrect?
\[\ce{2PbO(s) + C(s) → 2Pb(s) + CO2(g)}\]
- Lead is getting reduced.
- Carbon dioxide is getting oxidised.
- Carbon is getting oxidised.
- Lead oxide is getting reduced.
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State a reason why, when hydrogen is passed over heated copper oxide, the resultant product formed, differs in colour from the original reactant.
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\[\ce{3Fe_{(s)} + 4H2O_{(g)} -> Fe3O4_{(s)} + 4H2_{(g)}}\]
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(ii) Water is getting reduced.
(iii) Water is acting as the reducing agent.
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______ is a metal that has a high resistance to corrosion.
