Question

Classify the following into element,compound and mixture: Brass,gold,hydrogen sulphide,air Class9 CBSE board

Answer 1

Classify the following into element,compound and mixture:
Brass,gold,hydrogen sulphide,air
Class9 CBSE board
Ans.
Elements : - Gold
Compound : - Hydrogen Sulphide
Mixture : - Brass, Air
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Answer 2

Brass is a Mixture because it is formed by mixing the copper and zinc

Gold is an element because as it is written in the periodic table.

Hydrogen sulphide is a compound because it is mixed chemically by mixing hydrogen and sulphur.

Air is a mixture because it contains several gases like nitrogen,oxygen, CO2 etc.