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How do the ionic character and acidic na...

How do the ionic character and acidic nature vary among the oxides of first transition series?

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`rarr` As the oxidation number of a metal increases ionic character decreases in case of transition elements. Eg. : `Mn_(2)O_(7)` is a covalent green oil.
`rarr V_(2)O_(5)` is however amphoteric though mainly acidic `V_(2)O_(5)` reacts with alkali as well as acids to give `VO_(4)^(-3) and VO_(4)^(+)`.
`rarr Cro` is basic
`rarr Mn_(2)O_(7)` gives `HMnO_(4) and CrO_(3)` gives `H_(2)CrO_(4) and H_(2)Cr_(2)O_(7)`.
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VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-D AND F- BLOCK ELEMENTS AND CO-ORDINATION COMPOUNDS -VERY SHORT ANSWER QUESTIONS
  1. What is an alloy ? Give example.

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  2. Why do the transition metals readily form alloys ?

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  3. How do the ionic character and acidic nature vary among the oxides of ...

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  4. What is the effect of increasing pH on a solution of potassium dichrom...

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  5. Name the oxometal anions of the first series of transition metals in w...

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  6. Permanganate titrations are carried out in the presence of sulphuric a...

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  7. What is Lanthanoid contraction ?

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  8. What are the different oxidation states exhibited by the lanthanoids ?

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  9. What is Misch metal ? Given its composition and use.

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  10. What is actinoid contraction ?

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  11. What are co-ordination compounds? Give two examples.

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  12. What is a coordination polyhedron ?

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  13. What is a double salt? Give example.

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  14. What is difference between a double salt and complex compound ?

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  15. What is a ligand ?

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  16. Give one example each for ionic and neutral ligands.

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  17. How many moles of AgCl is precipitated when I mole of CoCl(3) is treat...

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  18. What is a chelate ligand ? Give example.

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  19. What is an ambidentatc ligand ? Give example.

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  20. CuSO(4).5H(2)O is blue in colour where as anhydrous CuSO(4) is colourl...

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