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(a) Why are Zn^(2+) salts white while Cu...

(a) Why are `Zn^(2+)` salts white while `Cu^(2+)` salts are blue ? (b) What is meant by 'disproportionation' ? Write the disproportionation reaction of `Cu^+` in aqueous solution.

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MODERN PUBLICATION-D AND F-BLOCK ELEMENTS-REVISION EXERCISES ( SHORT ANSWER QUESTION)
  1. Explain the following observations giving an appropriate reason for ea...

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  2. Transition elements are 'd-block elements. (i) Write any four characte...

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  3. (a) Why are Zn^(2+) salts white while Cu^(2+) salts are blue ? (b) W...

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  4. (a) How does permanganate solution react with Fe(II) ions? Write balan...

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  5. What are lanthanoids? Give their general electronic configurations. Wh...

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  6. (a) Why do transition elements show catalytic properties? (b) Calculat...

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  7. (a) Write down any three similarities between lanthanoids and actinoid...

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  8. (a) Define transition elements. Give the general electronic configurat...

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  9. (a) Why is the highest oxidation state of a transition metal exhibited...

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  10. (a) Why do the transition elements exhibit higher enthalpies of atomiz...

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  11. (a) Why do Zr and Hf have similar properties? (b) What happens when K2...

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  12. Give the preparation of potassium permanganate from pyrolusite ore.

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  13. (a) What happens when K2Cr2O7 is heated strongly? (b) Transition eleme...

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  14. (a) Describe the preparation of potassium dichromate from chromite ore...

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  15. (a) What is lanthanoid contraction? What is the cause of lanthanoid co...

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  16. (a) Write the electronic configuration of: (i) Co^(2+) (27) (ii) C...

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  17. (a) What is the cause of lanthanoid contraction? Discuss. (b) What is ...

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  18. When chromite ore FeCr(2)O(4) is fuse with NaOH in presence of air, a ...

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  19. Complete the following chemical equations : (i) 8MnO(4)^(-)+3S(2)O(3...

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  20. Give reason for the following : (i) Mn shows the highest oxidation s...

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