Showing posts with label Brass gets discoloured in air because of the presence of which of the following gases in air? page 591. Show all posts

Showing posts with label Brass gets discoloured in air because of the presence of which of the following gases in air? page 591. Show all posts

Monday, 28 December 2015

Brass gets discoloured in air because of the presence of which of the following gases in air?

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591. 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

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