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Acidified K2Cr2O7 solution turns green w...

Acidified `K_2Cr_2O_7` solution turns green when `Na_2SO_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)`

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The correct Answer is:
A
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AAKASH SERIES-D-BLOCK ELEMENTS-OBJECTIVE EXERCISE-3 (PREVIOUS NEET/AIPMT QUESTIONS)
  1. Which of the following oxidation states is common for all lanthanides ...

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  2. Compare the stability of + 2 oxidation state of the elements of the fi...

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  3. Acidified K2Cr2O7 solution turns green when Na2SO3 is added to it. Thi...

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  4. Which of the statements is not true?

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  5. Which one of the following does not correctly represent the correct or...

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  6. Four successive members of the first series of the transition metals a...

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  7. Catalytic activity of transition elements and their compounds is due t...

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  8. Which of the following exhibits only +3 oxidation state ?

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

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  10. Which of the following lanthanoid ions is diamagnetic ?

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  11. Identify the correct order of solubility of Na(2)S, CuS and ZnS in aqu...

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  12. The reaction of aqueous KMnO(4) with H(2)O(2) in acidic conditions giv...

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  13. Magnetic moment 2.83 BM is given by which of the following ions ?

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  14. Reason of lanthanodi contraction is

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  15. Magnetic moment 2.84B.M. is given by (Atomic number, Ni = 28, Ti = 22,...

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  16. Which of the following processes does not involve oxidation of iron ?

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  17. Because of lanthanoid contraction, which of the folliwng pairs of elem...

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  18. Assuming complete ionisation, same moles of which of the following com...

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  19. Gadolinium belongs to 4f series. Its atomic number is 64. Which of the...

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  20. The electronic configurations of Eu (Atomic No. 63), Gd (Atomic No. 64...

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