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Cr(2)O(7)^(2-)overset(H^(+))rarrCr^(3+),...

`Cr_(2)O_(7)^(2-)overset(H^(+))rarrCr^(3+)`, Eq. wt. of `Cr_(2)O_(7)^(2-)` is :-

A

mol. Wt/6

B

mol. Wt/3

C

mol. Wt/4

D

mol. Wt/1

Text Solution

Verified by Experts

The correct Answer is:
A
Reduction of `Cr_(2)O_(7)^(2-)` to `Cr^(3+)` is `6e^(-)` change
`Cr_(2)O_(7)^(2-)+14H^(+)+6e^(-)rarr2Cr^(3+)+7H_(2)O`
`:.` Eq. wt of `Cr_(2)O_(7)^(2-) =` Mol. Wt/6.
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DINESH PUBLICATION-REDOX REACTIONS-Revision Question
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  2. Oxidation numbers of two Cl atoms in belaching powder, CaOCl(2), are

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  3. Cr(2)O(7)^(2-)overset(H^(+))rarrCr^(3+), Eq. wt. of Cr(2)O(7)^(2-) is ...

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  4. KMnO(4) is a strong oxidising agent in acidic medium. To provide acidi...

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  5. Which of the following is a set of reducing agents?

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  6. Which of the following is a redox reaction ?

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  7. Oxidation number if iodine in IO(3)^(-), IO(4)^(-),KI and I(2) respect...

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  8. MnO(4)^(-) ions are reduced in acidic conditions to Mn^(2+) ions where...

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  9. Which of the following reactions involve disproportionation ?

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  10. The reaction P(4)+3NaOH+3H(2)Orarr2NaH(2)PO(2)+PH(3) is an example of

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  11. Cr(2)O(5) has structure as shown The oxidation number of chromium...

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  12. The oxidation number of S in S(8),S(2)F(2), and H(2)S, respectively, a...

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  13. In the following reaction: x KMnO(4)+y NH(3) rarr KNO(3)+MnO(2)+KOH+...

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  14. The brown ring complex compound of iron is formulated as [Fe (H(2)O)(5...

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  15. The equivalent mass of potassium permanganate in alkaline medium is

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  16. In which of the following reactions, there is no change in valency ?

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  17. In the balanced chemical reaction IO(3)^(ө)+al^(ө)+bH^(ө)rarrcH(2)O+...

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  18. The oxidation states of S atoms in S(2)O(6)^(2-) from left to right re...

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  19. Small quantities of compounds TX, TY and TZ are put into separate test...

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  20. The oxidation number of sulphur in H(2)SO(4),H(2)S(2)O(4) and H(2)S(2)...

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