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What happens when potassium dichromate r...

What happens when potassium dichromate reacts with `H_2S` and KI in acidic medium?

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R G PUBLICATION-THE d-AND f-BLOCK ELEMENTS-EXERCISE
  1. Explain the following facts: Transition elements form interstitial com...

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  2. How K2Cr2O7 is prepared? Write the necessary reactions involved.

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  3. What happens when potassium dichromate reacts with H2S and KI in acidi...

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  4. Indicate the steps in the preparation of KMnO4.

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  5. Write the cause of lenthanide contraction.

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  6. Actinoid contraction is greater from element to element than lanthanoi...

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  7. What is meant by disproporation'. Give two examples of disproporationa...

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  8. Compare the chemistry of actinoids with that of the lanthanoids with s...

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  9. Write three applications of d-block elements.

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  10. Explain the following: Cu(I) ion is not known is aquous solution

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  11. How would you account for the following? The enthalpies of atomization...

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  12. Explain the following: Co (II) is stable in aquous solution but in the...

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  13. Explain the following: The oxidizing power of oxoanions are in the ord...

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  14. Explain the following: The colour of potassium dichromate

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  15. What happens when: Copper sulphate reacts with potassium iodide

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  16. What happens when: Potassium permanganate is heated to 513K

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  17. What happens when: What happens when: Oxalic acid react with KMnO4 in ...

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  18. What happens when: KMnO4 reacts with KI in basic medium.

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  19. What happens when: Manganous salt oxidised by KMnO4 in presence of ZnO...

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  20. Why is the highest oxidation state of a metal exhibited in its oxide o...

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