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Redox Reactions

Short Answer Type

1. What is oxidation (electronic concept)?

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What is reduction (electronic concept)?

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What is reducing agent (electronic concept)?

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4. What is an oxidising agent (electronic concept)?

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5. Write the following redox reaction using half equation:

Zn left parenthesis straight s right parenthesis space plus space PbCl subscript 2 left parenthesis aq right parenthesis space space rightwards arrow space space space space Pb left parenthesis straight s right parenthesis space plus space ZnCl subscript 2 left parenthesis aq right parenthesis

Mention:
(i) Which reactant is oxidised? To what?
(ii) Which reactant is the oxidiser?
(iii) Which reactant is reduced? To what?
(iv) Which reactant is the reducer?

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In the reduction,
$MnO subscript 2 space plus space 4 HCl space space rightwards arrow space space space MnCl subscript 2 space plus space Cl subscript 2 space plus space 2 straight H subscript 2 straight O$
which species is oxidised?