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Olympiad-Science
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Class 8
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Q)
When Cu is exposed to moist air for a long time, which of the following is formed?
(
A
)
C
u
(
O
H
)
2
(
B
)
C
u
C
O
3
(
C
)
B
o
t
h
(
A
)
a
n
d
(
B
)
(
D
)
C
u
2
O
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