Q. When metallic copper comes in contact with moisture, a green power/pasty coating can be seen over it. This is chemically known as
A) Copper carbonate-copper sulphate
B) Copper carbonate-copper hydroxide
C) Copper sulphate-copper sulphide
D) Copper sulphide-copper carbonate
Explanation
(b)
$Cu + O_{2} + CO_{2} + H_{2}O \rightarrow Cu(OH)_{2} \bullet CuCO_{3}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.