Question

The articles made up of copper lose their shine when left open in moist air for long and forms a green coloured coating on the surface due to the formation of a substance 'X'. Chemically 'X'
is
1) Cuo Cu(OH)2
2)CUCO3 Cu(OH)3
3)CuCo3.Cu(OH)2
4) CuCO3-Cuo​

Answer 1

Answer:

"X" is chemically CuCO3.Cu(OH)2

Answer 2

$\huge\red{EXpLaTIoN}$

The metal has corroded because of being exposed to moist air.

Green compound is basic copper carbonate [CuCO3. Cu (OH)2]

The metal is copper.

Two ways to prevent this process :

Painting, Greasing, Oiling, Galvanizing (any two)

$\huge\red{AnsWeR}$

$<marquee>CuCo3.Cu(OH)_2$

OPTION C