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The number of electrons lost in the foll...

The number of electrons lost in the following change is
`Fe+H_(2)OrarrFe_(3)O_(4)+H_(2)`

A

2

B

4

C

6

D

8

Text Solution

Verified by Experts

The correct Answer is:
D
(d) `3overset(0)(F)e + 8e^(-) rarr (Fe^(8//3+) 3)`
`underline(2H^(+) rarr overset(0)(H)_2 +2e^(-) xx 4)`
`underline(3Fe + 4H_2O rarr Fe_3O_4 + 4H_2)`
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DISHA PUBLICATION-REDOX REACTIONS-EXERCISE-1 : CONCEPT BUILDER ( TOPICWISE )
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  2. Which of the following statements is not correct?

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  4. For the reaction : NH3 + OCI^(-) rarr N2H4 + Cl^(-) in basic medium, t...

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  5. Which of the following reactions involve disproportionation ?

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  6. In a balanced equation H(2)SO(4)+xHI rarr H(2)S+YI(2)+zH(2)O, the valu...

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  7. KMnO4 oxidises oxalic acid in acidic medium. The number of CO2 molecul...

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  8. In the chemical reaction, K2 Cr2 O7 + xH2 SO4 + ySO2 rarr K2SO4 + Cr2(...

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  9. Consider the following reaction 5H2O2 +XCIO2 +2OH^(-) rarr XCI^(-)- + ...

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  10. Number of moles of K2Cr2O7 reduced by one mole of Sn^(2+) ion is

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  11. Which of the following statements is not correct?

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  12. The species that undergoes disproportionational is an alkaline medium ...

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  13. What products are expected from the desproprtionation reactin of hypoc...

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  14. Which is the best description of the behaviour of bromine in the react...

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  15. The number of electrons lost in the following change is Fe+H(2)Orarr...

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  16. When copper is treated with a certain concentration of nitric acid, ni...

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  17. Which of the following is not a disproportionation reaction? I. NH4N...

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  18. Which fo the following statements are correct concerning redox propret...

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  19. Standard electrode potentials of redox couples A^(2+)//A, B^(2+)//B, C...

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  20. The standard electrode potential of four metallic elements (A, B, C an...

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