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Yellow coloured aquesous solution of sod...

Yellow coloured aquesous solution of sodium chromate changes to orange when acidified with sulphuric acid because

A

`H^(+)` ions convert chromate ions to dichromate ions

B

`H^(+)` ions react with sodium chromate to give sodium ions which turn solution orange

C

`Cr^(3+)` ions are liberated in the solution which turn the solution orange

D

sodium hydroxide is formed during the reaction which imparts orange colour to the solution.

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The correct Answer is:
A
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NCERT FINGERTIPS-THE D- AND F- BLOCK ELEMENTS -Some Important Compounds Of Transition Elements
  1. Which of the following reactions do not result in the preparation of p...

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  2. Which of the following compounds is used as the starting material for ...

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  3. Yellow coloured aquesous solution of sodium chromate changes to orange...

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  4. What happens when potassium iodide reacts with acidic solution of pota...

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  5. Acidified potassium dichromate reacts with potassium iodide and oxidie...

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  6. One mole of acidified K(2)Cr(2)O(7) on reaction with excess of KCl wil...

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  7. What would happen when a solution of potassium chromate is treated wit...

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  8. Identify the correct structure of dichromate ion.

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  9. In the dichromate anion (Cr2O7^(2-))

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  10. When MnO2 is fused with KOH and O2, what is the product formed and its...

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  11. The equation 3MnO4^(2-)+4H^(+)to2MnO4^(-)+MnO2+2H2O represents

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  12. Explain why does colour of KMnO(4) disappear when oxalic acid is added...

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  13. Complete the given reactions. (A) 2MnO4^(-)+H2O+I^(-)to2ul((i))+2O...

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  14. The number of moles of KMnO(4) that will be needed to react completely...

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  15. Complete the given reaction. 2Mn^(2+)+5ul((i))+8H2Oto2ul((ii))+10ul...

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  16. Which of the following is correct representation of reaction of acidif...

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  17. Which of the following reactions is not correct ?

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  18. A solution of KMnO4 is reduced to various products depending upon its ...

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  19. In acidic medium, KMnO4 oxidises FeSO4 solution. Which of the followin...

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  20. Complate the following reactions. (i) Cr2O7^(2-)+3SO2+2H^(+)to2Cr^(3...

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