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When metallic copper comes in contact wi...

When metallic copper comes in contact with mositure, a green powdery/pasty coating can be seen over it. This is chemically known as

A

Copper sulphide - Copper carbonate

B

Copper carbonate - Copper sulphate

C

Copper carbonate - Copper hydroxide

D

Copper Sulphate - Copper sulphide

Text Solution

Verified by Experts

The correct Answer is:
C
`Cu + O_2 + CO_2 + H_2O to Cu(OH)_2. CuCO_3`.
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ERRORLESS-THE d-AND f- BLOCK ELEMENTS -NCERT BASED QUESTIONS (Compounds of Transitional Elements)
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  2. When CuSO4 solution is added to K4[Fe(CN)6], the formula of the produ...

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  3. When metallic copper comes in contact with mositure, a green powdery/p...

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  4. Colourless solutions of the following four salts are placed separately...

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  5. The metal which can be used to obtain metallic Cu from aqueou...

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  6. Identify the statement which is not correct regarding CuSO4?

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  7. On adding excess of NH(3) solution to CuSO(4) solution, the dark blue ...

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  8. A blue colouration is not obtained when

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  9. What is the effect of shaking dil. H(2)SO(4) with small quantity of an...

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  10. Which among the following alloys is used in making instruments for el...

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  11. When CuSO(4) is hydrated, then it becomes

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  12. Copper sulphate solution reacts with KCN to give (a) Cu(CN)(2) (b)...

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  13. Why does AgNO(3) produced a black stain on the skin?

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  14. Silver nitrate is supplied in coloured bottles because it is

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  15. Which of the following metal hydroxides does not dissolve in sodium hy...

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  16. Silver nitrate solution is used to study

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  17. Which of the following is more soluble in ammonia ?

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  18. Which one of the following is highest melting point

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  19. Percentage of silver in German silver is

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