Teaching CG TET Paper 1 & 2 Mock Test 2024 General Science Chemistry

When Copper vessel is exposed to moist air for long time, it acquires dull green coating which is a mixture of:

1
Cu(OH)2 and CuSo4
2
CuSo4 and CuCo3
3
CuCl2 and CuCo3
4
Cu(OH)2 and CuCo3
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