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Write two alloys of copper and their use...

Write two alloys of copper and their uses.

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NCERT TELUGU-D-BlOCK ELEMENTS-SELF EVALUATION (ANSWER IN ONE OR TWO SENTENCES)
  1. Explain why d-block elements exhibit variable oxidation states?

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  2. Transition elements form complexes due to

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  3. Why does Mn(II) show maximum paramagnetic character among the bivalent...

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  4. Why Zn^(2+) salts are white while Ni^(2+) salts are coloured?

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  5. [Ti(H(2)O)(6)]^(3+) is coloured while [Sc(H(2)O)(6)]^(3+) is colourles...

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  6. A substance is found to have a magnetic moment of 3.9 BM. How many unp...

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  7. Explain why the melting and boiling points of Zn, Cd, Hg are low?

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  8. Explain why Mn^(2+) is more stable than Mn^(3+)?

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  9. Write two alloys of copper and their uses.

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  10. Write short notes on alumino thermic process?

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  11. Name the first and last element in the second transition series.

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  12. Name the lightest and the heaviest elements (in terms of density) amon...

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  13. Which of the following ions would form colourless complexes? Cu^(2+)...

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  14. What happens when KI solution is added to an aqueous solution of coppe...

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  15. What happens if the copper sulphate crystals taken into dry test tube ...

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  16. Discuss the extraction of copper from copper pyrites.

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  17. Name the ores of gold. Explain how it is extracted from its alluvial g...

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  18. List the ores of silver. How silver is extracted from Argentite?

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  19. Explain the extraction of Zinc form Zinc blende.

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  20. Explain how dichromate is extracted from its chromite are. Write the b...

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