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Cr(2)O(7)^(2-)overset(pH=x)rarrCrO(4)^(2...

`Cr_(2)O_(7)^(2-)overset(pH=x)rarrCrO_(4)^(2-)overset(pH=y)rarrCr_(2)O_(7)^(2-)`
x and y can be :

A

4 and 5

B

4 and 8

C

8 and 4

D

8 and 9

Text Solution

Verified by Experts

The correct Answer is:
C
`Cr_(2)O_(7)^(2-)+2OH^(-)rarr2CrO_(4)^(2-)+H_(2)O" "pHgt7(xlt7)`
`2CrO_(4)^(2-)+2H^(+)rarrCr_(2)O_(7)^(2-)+H_(2)O" "pH lt7(Ylt7)`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-D - AND F-BLOCK ELEMENTS-Exercise 2 (Miscellaneous Problems)
  1. Which pair of compounds is expected to show similar colour in aqueous ...

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  2. Match the following columns.

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  3. Cr(2)O(7)^(2-)overset(pH=x)rarrCrO(4)^(2-)overset(pH=y)rarrCr(2)O(7)^(...

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  4. Consider the following statements, A. Colour of a transition metal ...

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  5. When a magnetic field is applied to substances, mainly two type of mag...

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  6. Match the properties given in Column I with the metals given in Column...

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  7. The ion Cr^(2+) is redusing agent while that of Mn^(3+) is an oxidisin...

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  8. Which of the following statement (s) is /are correct? (I) CuS is wh...

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  9. Cuprous ion is colourless, while cupric ion is colured because

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  10. The oxidation number of Mn in the product of alkaline oxidative fusion...

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  11. The 3d-metal ion are generally paramagnetic in nature because

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  12. the caculated magnetic moment of a divalent ion of an atomic number 2...

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  13. Four successive members of the first row transition elements are liste...

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  14. Among the following series of transition metal ions, the one in which ...

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  15. The colourless species is

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  16. Amongst the following, the lowest degree of paramgnetism per mole of t...

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  17. Which do not decolourise KMnO(4) in aqueous solution?

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  18. Potassium permaganate acts as oxidant in alkaline and acidic media. Th...

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  19. A certain metal will liberate hydrogen from dilute acids. It will reac...

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  20. Cu^(2+) has a stronger polarising power than that of Ca^(2+) because

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