Question

The metal A is reddish brown in color .the metal A reacts with B,C,D when expossed to air and forms the dull green color coating on it.the dull green coating contains compounds E &F .identify the A,B,C,D,E,F

Answer 1

1.A is the Copper .
It is clear that A is copper developing green layer of CuCO3
2. (B)Cu forms 2 types of oxides: Cu2O and CuO
Cu2O is red while CuO is black.
Hence, A= Cu,
B= CuCO3
C=CuO,
D= Cu2O
E and F are basic copper carbonate CuCO3.Cu(OH)2

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Answer 2

• A is copper
• B,C and D can be Carbon dioxide, Oxygen, and water
• E can be Copper Carbonate
• F can be Copper Hydroxide
• E and F together forms basic copper carbonate