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Write chemical reaction for preparation ...

Write chemical reaction for preparation of K2Cr207 from chromite ore.

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. Express 1380 in roman numbers.

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  2. Draw lewis structure of hydronium ion .

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  3. Write chemical reaction for preparation of K2Cr207 from chromite ore.

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  4. Write the oxidation of H2S by acidified KMnO4.

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  5. Write the oxidation of H2S by acidified KMnO4.

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  6. What are lanthanoids ?

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  7. Why transition metals show catalytic properties?

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  8. How would you account for the following: The d1 configuration is very ...

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  9. How would you account for the following : SF(6) is kinetically inert...

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

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  11. Give reasons for the following : Copper cannot displace zinc from it...

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  12. Why the actinoids exhibit a large number of oxidation states than the ...

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  13. How would you account for the following : SF(6) is kinetically inert...

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  14. Why the actinoids exhibit a large number of oxidation states than the ...

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  15. How would you account for the following ? Most of the transition metal...

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  16. Why enthalpy of atomisation of the transition elements are quite high ...

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  17. Give an explanation for the following observation : The greatest numbe...

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  18. Give reason, Mn^(2+) ion is more paramagnetic than Fe^(2+) ion.

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  19. Complete the following chemical equation : Cr2O7^(2-) (aq)+ Fe^(2+) (a...

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  20. Complete the following chemical equation : 2CrO4^(2-) + 2H^(+) rarr

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