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

Hello,

The answer is option B "Hydrogen sulphide".

Reason:

The answer is option B because hydrogen sulphide it combines with oxygen in air and form water, evaporates.

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~Nonportrit

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.

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