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Acidified K(2)Cr(2)O(7) solution turns g...

Acidified `K_(2)Cr_(2)O_(7)` solution turns green when `Na_(2)SO_(3)` is added to it. This is due to the formation of

A

`Cr_2(SO_4)_3`

B

`CrO_4^(2-)`

C

`Cr_2(SO_3)_3`

D

`CrSO_4`

Text Solution

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The correct Answer is:
A
`K_2Cr_2O_7 + 3Na_2SO_3 + 4H_2SO_4to 3Na_2SO_4 + K_2SO_4 + Cr_2(SO_4)_3`
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MODERN PUBLICATION-D AND F-BLOCK ELEMENTS-COMPETITION FILE (MULTIPLE CHOICE QUESTION ((B) MULTIPLE CHOICE QUESTION FROM COMPETITIVE EXAMINATION))
  1. Among the oxides, Mn2O7 (I), V2O3 (II), V2O5 (III), CrO (IV) and Cr2O3...

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  2. The acidic, basic or amphoteric nature of Mn2O7, V2O5 and CrO are res...

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  3. Acidified K(2)Cr(2)O(7) solution turns green when Na(2)SO(3) is added ...

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  4. For the four successive transition elements (Cr, Mn, Fe, and Co), the ...

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  5. Which of the following statements is not true ?

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  6. Which of the following does not give oxygen on heating ?

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  7. Which of the following lanthanoid ions is diamagnetic ? (At nos . Ce...

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  8. Reason of lanthanoid contraction is

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  9. The reaction of aqueous KMnO4 with H2O2 gives

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  10. Magnetic moment 2.83 BM is shown by which of the following ions?

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  11. Among the transition metals of 3d series, that one that has the highes...

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  12. Gadolinium belongsd to 4f series. It's atomic number is 64. which of t...

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  13. Because of lanthnoid contraction, which of the following pairs of elem...

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  14. The electronic configuration of Eu (Atomic No. 63), Gd (Atomic No. 64)...

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  15. Which one of the following statements related to lanthanons is incorre...

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  16. Name the gas that can readily decolourise acidified KMnO(4) solution:

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  17. The reason for greater range of oxidation state in actinoids is attrib...

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  18. Which one of the following ions exhibits d-d transition and paramagnet...

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  19. Match the metal ions given in Column I with the spin magnetic moments ...

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  20. The magnitude and permanganate ions are tetrahedral due to

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