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Identify the cases(s) where there in ch...

Identify the cases(s) where there in change in oxidation number.

A

Acidified solution of `CrO_4^(2-)`

B

`SO_2` gas bubbled through an acidic solution of `Cr_2O_7^(2-)`

C

Alkaline solution of `Cr_2O_7^(2-)`

D

Ammoniacal solution of `CrO_4^(2-)`

Text Solution

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The correct Answer is:
B
`SO_2` gas bubbled through an acidic solution of `Cr_2O_7^(2-)`
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MODERN PUBLICATION-D AND F-BLOCK ELEMENTS-COMPETITION FILE (MULTIPLE CHOICE QUESTION ((B) MULTIPLE CHOICE QUESTION FROM COMPETITIVE EXAMINATION))
  1. When MnO2 is fused with KOH and KNO3 , a coloured compound is forme...

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  2. In the following reaction, ZnO is respectively acting as a/an (i) Zn...

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  3. Identify the cases(s) where there in change in oxidation number.

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  4. Of the following outer electronic configurations of atoms, the highest...

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  5. Which of the following pair is an amphoteric oxide ?

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  6. KMnO(4) acts as on oxidising agent in alkaline medium. When alkaline K...

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  7. Incorrect statement with reference to Ce (Z = 58).

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  8. When a mixture of solid NaCl and solid K(2)Cr(2)O(7) is heated with co...

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  9. Which of the following statement is wrong?

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  10. Maximum oxidation state of uranium and plutonium are respectively :

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  11. What is the shape and magnetic nature of permanganate ion?

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  12. The highest value of the calculated spin-only magnetic moment (in BM)...

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  13. The element that usucally dose NOT show variable oxidation states is ...

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  14. A overset(4KOH.O2)(to) underset("green")(2B ) + 2H2O 3B overset(...

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  15. Which of the following statements about the interstitial compounds is ...

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  16. Thermal decomposition of a Mn compound (X) at 513 K results in compoun...

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  17. The correct order of the first ionization enthalpies is :

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  18. The effect of lanthanoid contraction in the lanthanoid series of eleme...

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  19. The maximum number of possible oxidation states of actinoides are show...

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  20. in Sc^(3+),Ti^(2+),Ti^(3+),V^(2+) increasing order of spin only magnet...

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