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An orange solid A on heating gives a col...

An orange solid A on heating gives a colourless gas B. The gas B in dry conditions is Passed Over heated Ca to give a solid C. The solid C further reacts with water to Produce gas D which forms a blue coloured compound E on reaction with copper sulphate solution. Identify A, B,C,D,E and give the sequence of reactions involved .

A

`(NH_4)_2 Cr_2O_7` and `Cr_2O_3`

B

`Na_2Cr_2O_7` and `Cr_2O_3`

C

`K_2Cr_2O_7` and `CrO_3`

D

`(NH_4)_2 CrO_4` and `CrO_3`

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. The reddish brown vapours formed when sodium chloride is heated with K...

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  2. How would you account for the increasing oxidising power in the series...

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  3. An orange solid A on heating gives a colourless gas B. The gas B in dr...

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  4. In neutral or faintly alkaline medium, thiosulphate is quantitatively ...

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  5. Which of the following ions has the same number of unpaired electrons ...

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  6. Among the following actinoid pairs, the maximum oxidation states is sh...

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  7. The atomic number of cerium (Ce) is 58. The correct electronic configu...

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  8. The only radioactive element among the lanthanoids is

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  9. Identify a ‘Chemical twin' among the following

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  10. How many grams of potassium dichromate are required to oxidise 20.0 g ...

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  11. Which of the following statement regarding lanthanides is false?

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  12. How is sodium chromate converted into sodium dichromate, in the manufa...

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  13. Identify the metal that forms colourless compounds.

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  14. What is the general molecular formula of the products obtained on heat...

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  15. Choose the wrong statement in the following:

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  16. In aqueous solution, Cr^(2+) is stronger reducing agent than Fe^(2+). ...

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  17. Choose the correct matching of transition metal ion and magnetic momen...

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  18. The bivalent metal ion having maximum paramagnetic behaviour is

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  19. When a brown compound of manganese (A) is treated with HCl it gives a ...

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  20. Why are Mn^(2+) compounds more stable than Fe^(2+) compounds towards o...

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