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chockalingam p
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science gk
Brass gets discoloured in air because of the presence of which of the following gases in air?
A. Oxygen
2 votes (66%)
A. Oxygen
B. Hydrogen sulphide
0 votes (0%)
B. Hydrogen sulphide
C. Carbon dioxide
1 vote (33%)
C. Carbon dioxide
D. Nitrogen
0 votes (0%)
D. Nitrogen
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