D-And F-Block Elements Ques 191

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

[AFMC 2002]

Options:

A) Copper sulphide - Copper carbonate

B) Copper carbonate - Copper sulphate

C) Copper carbonate - Copper hydroxide

D) Copper Sulphate - Copper sulphide

Show Answer

Answer:

Correct Answer: C

Solution:

$ Cu+O_2+CO_2+H_2O\to Cu{{(OH)}_2}.CuCO_3 $



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