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Home
All Subjects
CSS
CSS MPT
CSS Subjects MCQs
CSS Past Papers
Past Papers
Testing Agencies Papers
Departmental Past Papers
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FPSC
PPSC
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BPSC
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Subject:
Chemistry
Brass gets discoloured in air because of the presence of which of the following gases in air ________ ?
A.
Carbon dioxide
B.
Oxygen
C.
Nitrogen
D.
Hydrogen sulphide
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