General Science Paper

Science
Tutor: None Selected Time limit: 1 Day

Brass gets discolored in air because of the presence of which of the following gases in air? Oxygen.Hydrogen sulphide.Carbon dioxide,Nitrogn

May 10th, 2014

Hydrogen

May 10th, 2014

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May 10th, 2014
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May 10th, 2014
Mar 27th, 2017
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