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Name the basic cause of similar atomic r...

Name the basic cause of similar atomic radii of Hf and Zr.

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MODERN PUBLICATION-D AND F-BLOCK ELEMENTS-PRACTICE PROBLEM
  1. The orange colour of dichromate solution changes of blue on heating wi...

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  2. MnO2 on heating with potassium hydroxide in the presence of air forms...

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  3. Chromite is ...........

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  4. KMnO4 overset("heat")(to) ………… + MnO2 + …………..

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  5. Write ionic equation showing KMnO4 acting as an oxidising agent in ac...

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  6. What is the oxidation state of (i) Cr in dichromate ion (ii) ...

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  7. The equivalent weight of KMnO(4) in (a) neutral medium, (b) acidic med...

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  8. Complete the chemical reactions : (i) MnO4^(-) + SO2 + H^(+) to ...

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  9. What is the shape of chromate ion ?

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  10. In chromyl chloride test orange red vapours are obtained. These are du...

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  11. Which out of the two ,La(OH)(3) and Lu(OH)(3), is more basic and why?

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  12. Most stable oxidation state of Lanthanoids

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  13. How many unpaired electrons are present in Gd(Z = 64) ?

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  14. Name the actinoid used for the manufacture of fine rods for atomic rea...

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  15. Arrange Ce^(3+) (Z = 58), Sm^(3+) (Z = 62) and Yb^(3+ ) (Z = 70) in d...

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  16. Name the basic cause of similar atomic radii of Hf and Zr.

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  17. Does actinoids show actinoid contraction similar to lanthanoid contrac...

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  18. Name the trivalent lanthanoid having the configuration [Xe]4f^7

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  19. Which of the following ion is colourless? U^(3+) , Cm^(4+) , Th^(4...

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  20. Name two tripositive lanthanoid ions which are colourless.

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