Identify the species oxidised or reduced, or the correct statement, for a given redox reaction

1. A.
   Cr
2. B.
   H
3. C.
   O
4. D.
   I

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1. A.
   Mg is reduced
2. B.
   Mg is oxidised
3. C.
   N₂ is oxidised
4. D.
   oxidation state of Mg changes from +2 to zero

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1. A.
   As and O
2. B.
   Br and As
3. C.
   As and Br
4. D.
   Br and O

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1. A.
   $I_{2}$ is an oxidising agent
2. B.
   ${KClO}_{3}$ is reducing agent
3. C.
   Oxidation number of ' Cl ' decreases by 6
4. D.
   Oxidation number of I increase by 2

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1. A.
   Water is oxidized.
2. B.
   Hydrogen is oxidized.
3. C.
   Silver is reduced.
4. D.
   Hydrogen is reduced.

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1. A.
   $\mathrm{Sn^{2+}}$ is undergoing oxidation.
2. B.
   $\mathrm{Fe^{3+}}$ is undergoing oxidation.
3. C.
   It is not a redox reaction.
4. D.
   Both $\mathrm{Sn^{2+}}$ and $\mathrm{Fe^{3+}}$ are oxidized.

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