Areddish brown metal A when exposed to moist air forms a green layer B. When A is heated at different temperature in the presence of O_(2) it forms two typws of oxide -C (black ) and D red identify A, B, C, d and wrtie the balanced equation .

Areddish brown metal A when exposed to moist air forms a green layer B

1.	Areddish brown metal A when exposed to moist air forms a green layer B. When A is heated at different temperature in the presence of O_(2) it forms two typws of oxide -C (black ) and D red identify A, B, C, d and wrtie the balanced equation .
Answer» Solution :(i) A reddish BROW metal A is copper (Cu) (ii) when oppere (A) is exposed to moistair it forms green LAYER (B) is copper carbonate `Cu+O_(2)+CO_(2)+H_(2)OrightarrowCuCO_(3).CU(OH)_(2)` Copper carbonate (B) (iii) When copper is HEATED at different temperature in the presensence of oxygen , it forms two types of OXIDES `CuO` and `Cu_(2)O` ( Cand D) `2Cu+O_(2)("below"1370K)/(Delta)2CuO` `4Cu+O_(2) ("above"1370K)/(Delta)2Cu_(2)O`