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Transition metals form mostly coloured c...

Transition metals form mostly coloured compounds.Explain.

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. Complete the following chemical equation : MnO2+ KOH + O2 rarr

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

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  3. Transition metals form mostly coloured compounds.Explain.

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  4. Complete the following chemical equation : MnO4^(-)+ NO2^(-)+ H^(+) ra...

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  5. Give the preparation of Potassium Permanganate from Pyrolusite ore.

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  6. Explain how the colour of a solution of K2Cr2O7 depends on the pH of t...

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  7. Explain, giving reasons, which one of the following pairs exhibits the...

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  8. Explain, giving reasons, which one of the following pairs exhibits the...

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  9. Give one method of Preparation of K2Cr2O7 from sodium chromate.

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  10. Why is Cu considered to be a transition element and Zn not ?

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

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  12. State what happens when a solid mixture of KCl and K2Cr2O7 is heated w...

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  13. Name the element showing maximum number of oxidation states among the ...

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  14. Explain the following observation giving an appropriate reason : Mn^(2...

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  15. Write the name of metal which shows only +3 oxidation state.

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  16. What is lanthanoid contraction ?

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  17. Give the general electronic configuration of d-block elements.

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  18. Out of Fe^(2+) and Fe^(3+) which is more paramagnetic and why ?

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  19. What is Actinoid contraction ? Explain it.

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  20. What arecoinage metals ?

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