In the following redox reaction Cr2O72-Fe2- Fe3-Cr3- One mole of Cr2O72- oxidises-

Oxidation half reaction 6Fe^+2→ 6Fe^+3+6e^ Reduction half reaction Cr_2O_7^2 +14H^++6e^ → 2Cr^+3+7H_2O nbsp; The full ionic equation may be obtained by addin ...

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Byju's Answer

Standard XII

Chemistry

Chemical Properties of Alkanes

In the follow...

Question

In the following redox reaction $C r_{2} O_{7}^{2 -} + F e^{2 +} \to F e^{3 +} + C r^{3 +}$ One mole of $C r_{2} O_{7}^{2 -}$ oxidises?

1 mole of

F e^{2 +}

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3 mole of

F e^{2 +}

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4 mole of

F e^{2 +}

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6 mole of

F e^{2 +}

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Solution

The correct option is D 6 mole of $F e^{2 +}$
Oxidation half reaction $6 F e^{+ 2} \to 6 F e^{+ 3} + 6 e^{-}$
Reduction half reaction $C r_{2} O_{7}^{2 -} + 14 H^{+} + 6 e^{-} \to 2 C r^{+ 3} + 7 H_{2} O$
The full ionic equation may be obtained by adding the half-reaction for potassium dichromate to the half-reaction for the reducing agent
$6 F e^{2 +} + C r_{2} O_{7}^{2 -} + 14 H^{+} \to 6 F e^{+ 3} + 2 C r^{+ 3} + 7 H_{2} O$
Thus, One mole of $C r_{2} O_{7}^{2 -}$ oxidises 6 mole of $F e^{2 +}$

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Similar questions

Q. Write balanced half reactions for the following redox reaction:

C r_{2} O_{7}^{2 -} + F e^{2 +} \to C r^{3 +} + F e^{3 +}

Q. Write the final balanced reaction for the following redox reaction:

C r_{2} O_{7}^{2 -} + F e^{2 +} \to C r^{3 +} + F e^{3 +}

Q. In the following redox reaction

{C r}_{2} O_{7}^{2 -} + {F e}^{2 +} ⟶ {F e}^{3 +} + {C r}^{3 +}

1 mol of

C r_{2} O_{7}^{2 -}

oxidizes x mol of

{F e}^{+ 2}

. Find x.

Q. In the following redox reaction

C r_{2} O_{7}^{2 -} + F e^{2 +} ⟶ F e^{3 +} + C r^{3 +} 1

mole of

C r_{2} O_{7}^{2 -}

oxidises?

Q. How many electrons are involved in the following redox reaction?

C r_{2} O_{7}^{2 -} + F e^{2 +} + C_{2} O_{4}^{2 -} \to C r^{3 +} + F e^{3 +} + C O_{2}

(Unbalanced)

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In the following redox reaction Cr2O2−7+Fe2+→Fe3++Cr3+ One mole of Cr2O2−7 oxidises?

In the following redox reaction $C r_{2} O_{7}^{2 -} + F e^{2 +} \to F e^{3 +} + C r^{3 +}$ One mole of $C r_{2} O_{7}^{2 -}$ oxidises?