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The black oxide of copper (CuO) in attac...

The black oxide of copper (CuO) in attacked by moisture and carbon dioxide in air and forms a green film of :

A

`Cu(OH)_(2) and C`

B

`Cu(OH)_(2) * CuCO_(3)`

C

`CuCO_(3) and CO_(2)`

D

`Cu(OH)_(2) * CuSO_(4)`

Text Solution

Verified by Experts

The correct Answer is:
B
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MODERN PUBLICATION-CHEMISTRY OF D-AND F-BLOCK ELEMENTS-Multiple Choice Questions (Level -I) Transition metal compounds and their Characteristics
  1. The compound which gives off oxygen on moderate heating is :

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  2. Nessler's reagent is :

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  3. The black oxide of copper (CuO) in attacked by moisture and carbon dio...

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  4. FeCl(3) has each of the following characteristics except :

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  5. Thomas slag is :

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  6. Blister copper is :

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  7. Iron is obtained on a large scale by reduction of Fe(2)O3 with :

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  8. Which of the following ions exist as dimer ?

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  9. Kl and CuSO(4) solutions when mixed give :

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  10. Ammonium dichromate is used in fireworks. The green coloured blown in ...

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  11. The number of moles of KMnO4 that will be needed to react with one mol...

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  12. Silica is added to roasted copper ore during smelting in order to remo...

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  13. Iron is rendered passive when treated with conc. :

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  14. The principal oxidation state of lanthanides is :

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  15. The lanthanoid contraction refers to :

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  16. Which of the following is not correct ?

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  17. Which of the following ions is paramagnetic ?

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  18. The separation of landthanoids in ion exchange method is based on :

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  19. which of the following has the smallest ionic radius ?

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  20. Zr and Hf have almost identical atomic radii. Give reason.

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