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FeCr(2)O(4)+Na(2)CO(3)+O(2)overset("Fusi...

`FeCr_(2)O_(4)+Na_(2)CO_(3)+O_(2)overset("Fusion")to[X]underset(H_(2)O)overset(H^(+))[Y]underset(H_(2)O_(2))overset(H^(+))to[Z]`
Whichf of the following statement is true for the compounds [X], [Y] and [Z]?

A

In all three compounds, the chromium is in +6 oxidation state

B

[Z] is a deep blueu-violet coloured compound which decomposes rapidly in aqueous solution into `Cr^(3+)` and dioxygen.

C

Saturated solution of [Y] gives bright orange compound, chromic anhydride, with cold and concentrated `H_(2)SO_(4)`.

D

All of these.

Text Solution

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The correct Answer is:
D
`4FeCr_(2)O_(4)+8Na_(2)CO_(3)+7O_(2)overset(Fusion)Na_(2)overset(+VI)(CrO_(4))underset(H_(2)O)overset(H^(+))toNa_(2)overset(+VI)(Cr_(2))O_(7)underset(H_(2)O_(2))overset(H^(+))to overset(+VI)(Cr)O(O_(2))_(2)` (deep blue violet) `overset(H_(2)O)toO_(2)+H_(2)O+Cr^(3+)`. (X) (Y) (Z)
`Na_(2)Cr_(2)O_(7)+H_(2)SO_(4)to2CrO_(3)` (bright orange/red-chromic anhydride) +`Na_(2)SO_(4)+H_(2)O`.
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RESONANCE-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Only one option correct type
  1. When AgNO(3)(aq) reacts with excess of iodine, we get:

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  2. When K(4)[Fe(CN)(6)] is added to FeCl(3) , the complex compound formed...

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  3. FeCl(3).6H(2)O is actually:

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  4. Aqueous solution of which of the following ions is green?

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  5. Aqueous solution of (P) and (Q) are violet. (P) turns green on oxidati...

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  6. In the reaction,2CuCl(2)+2H(2)O+SO(2)toA+H(2)SO(4)+2HCl,A is

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  7. German silver is an alloy of copper and:

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  8. When copper is placed in the atmosphere for sufficient time, a green c...

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  9. FeCl(3) dissolves in

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  10. When AgNO(3)(aq) reacts with excess of iodine, we get:

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  11. ZnO+CoOoverset(Delta)toX: product 'X' colour is

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  12. The compound that gets oxidised even on exposure to atmosphere is:

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  13. The +3 ion of which one of the following has half filled 4f subshell?

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  14. Among the following series of transition metal ions, the one where all...

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  15. The pair of the compounds in which both the metals are in the highest ...

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  16. VO(2) is an amphoteric oxide and in acidic medium it forms:

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  17. S(1) : Mn^(2+) compounds more stable than Fe^(2+) towards oxidation to...

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  18. Identify the incorrect statement.

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  19. CuFeS(2)+O(2)("excess")overset(Delta)toX(s)+Y(s) Note: Corresponding...

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  20. FeCr(2)O(4)+Na(2)CO(3)+O(2)overset("Fusion")to[X]underset(H(2)O)overse...

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