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Assertion : Separation of Zr and Hf is d...

Assertion : Separation of Zr and Hf is difficult. Reason : Because Zr and Hf lie in the same group of the periodic table.

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. Draw lewis structure of SOCl2

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  2. In the following questions a statement of assertion followed by a stat...

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  3. Assertion : Separation of Zr and Hf is difficult. Reason : Because Zr ...

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  4. Assertion : Actinoids form relatively less stable complexes as compare...

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  5. Assertion : Cu cannot liberate hydrogen from acids. Reason : Because i...

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  6. Assertion : The highest oxidation state of osmium is +8. Reason : Osmi...

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  7. Explain the following observation : Cu^+ ion is not known in aqueous s...

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  8. Why is equropium (II) more stable than cerium (II) (Eu = 63, Ce =58) g...

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  9. Which ion has maximum size in Lanthanoid series ?

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  10. Write the general electronic configuration of lanthanoids.

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  11. Why does Mn(II) shows maximum paramagnetic character among the dival...

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  12. How would you account for the irregular variation of ionisation enthal...

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

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  14. What is meant by ‘disproportionation’? Give two examples of disproport...

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  15. Compare the chemistry of actinides with that of Lanthanides with speci...

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  16. Compare the chemistry of actinides with that of Lanthanides with speci...

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  17. Draw lewis structure of SCl2

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  18. What are the main consequences of lanthanoid contraction ?

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  19. Complete the following reaction equation : MnO4^(-) + Fe^(2+) + H^(+) ...

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  20. Complete the following reaction equation : MnO4^(-) + I^(-) + H2O rarr

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