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In the following reactions: a. 3MnO(2)...

In the following reactions:
a. `3MnO_(2)+4Alrarr3Mn+2Al_(2)O_(3)`
b. `2MnO_(4)^(ө)+16H^(o+)+10Cl^(ө)rarr2Mn^(2+)+5Cl_(2)+8H_(2)O`
Which species is reduced and which is oxidised?

Text Solution

Verified by Experts

The correct Answer is:
A, B, C, D
a. `MnO_(2)` is reduced and aluminium is oxidised.
b. `MnO_(4)^(ө)` is reduced, and `Cl^(ө)` is oxidised.
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Knowledge Check

  • In the reaction 3MnO_(2) + 4A1 to 3Mn + 2A1_(2) O_(3) the oxidizing agent is

    A
    `MnO_(2)`
    B
    A1
    C
    `A1_(2)_(3)`
    D
    Mn

  • Consider the following reactions, (I) 2Mn_(2)O_(7) rarr 4MnO_(2) + 3O_(2) (II) SnCl_(2) + 2FeCl_(3) rarr SnCl_(4) + 2FeCl_(2)

    A
    intermolecular redox reaction and intramolecular redox reactions respectively
    B
    Both reaction I and II are intermolecular redox reaction
    C
    Both reaction I and II are intramolecular redox reactions
    D
    intramolecular redox reactions and intermolecular redox reaction respectively

  • In the reaction C_(2)O_(4)^(2-)+MnO_(4)^(-)+H^(+) rarr Mn^(2+)+CO_(2)+H_(2)O the reductant is

    A
    `C_(2)O_(4)^(2-)`
    B
    `MnO_(4)^(-)`
    C
    `Mn^(2+)`
    D
    `H^(+)`
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