SciencE
Q.
Brass gets discoloured
in air because of the
presence of which of
the following gases in
air?
A.
Oxygen
B.
Hydrogen sulphide
C.
Carbon dioxide
D.
Nitrogen
Ans;b
Brass gets discoloured
in air because of the
presence of which of
the following gases in
air?
A.
Oxygen
B.
Hydrogen sulphide
C.
Carbon dioxide
D.
Nitrogen
Ans;b
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