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Which of the following statements is not...

Which of the following statements is not true ?

A

On passing `H_2S` through acidified `K_2Cr_2O_7` solution, a milky colour is observed.

B

`Na_2Cr_2O_7` is preferred over `K_2Cr_2O_7` in volumetric analysis.

C

`K_2Cr_2O_7` solution in acidic medium is orange

D

`K_2Cr_2O_7` solution becomes yellow on increasing the pH beyond 7.

Text Solution

Verified by Experts

The correct Answer is:
B
`K_2Cr_2O_7` is preferred over `Na_2Cr_2O_7` in volumetric analysis because `Na_2Cr_2O_7` is deliquescent.
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MODERN PUBLICATION-D AND F-BLOCK ELEMENTS-COMPETITION FILE (MULTIPLE CHOICE QUESTION ((B) MULTIPLE CHOICE QUESTION FROM COMPETITIVE EXAMINATION))
  1. Acidified K(2)Cr(2)O(7) solution turns green when Na(2)SO(3) is added ...

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

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  3. Which of the following statements is not true ?

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

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

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  6. Reason of lanthanoid contraction is

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  7. The reaction of aqueous KMnO4 with H2O2 gives

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

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

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

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

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

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

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

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

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

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

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  18. The magnitude and permanganate ions are tetrahedral due to

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  19. Amount of oxalic acid present in a solution can be determined by its t...

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  20. Mark the correct statements(s) (1) Manganeses exhibits +7 oxidation ...

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