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ICSE Class 6 Answered

you gave an example that water is compound andtea is mixiture i just wanted to ask that water has also 2 different elements like hydrogen and oxygen therefore tea has also have 2 different elements then why is water not a mixture????
Asked by shreydaga7905.6sdatl | 24 Apr, 2020, 11:40: AM
answered-by-expert Expert Answer

Lets first understand what is compound and mixture and their differences.

Compounds: When two or more different elements are combined chemically in a fixed proportion, a compound is formed. Being a pure substance A compound has definite set of properties. Elements in a compound cannot be separated by physical method. In the chemical compound, the elements are always present in a definite proportion. Example: Water (H2O).
 
Mixture: A mixture is an impure substance made up of two or more elements or compounds mechanically mixed together in any proportion. Example: Gunpowder is a mixture of sulphur, carbon and potassium nitrate.
 

Compound

Mixture

1. It is obtained by the chemical combination of more than one element.

1. It is obtained by the physical combination of either elements, or compounds, or both.

2. The composition of elements present in a compound is fixed.

2. The composition of elements present in a mixture is not fixed.

3. The properties of a compound are different from those of its elements.

3. It shows the properties of all its constituent elements.

4. Its constituents can be separated by using only chemical and electrochemical methods.

4. Its constituents can be separated using physical methods.

5. A compound is always homogeneous in nature.

5. The mixtures can be homogeneous or heterogeneous.

 

 
 
 
 
 
 
 
 
 
 
 Water is not a mixture because it is formed by chemical combination of two elements hydrogen and oxygen and its composition will never change it will remain H2O. 
And in case of tea it is a mixture because it is prepared by combination of compounds, and its composition is not fix.
 
 
Answered by Ramandeep | 24 Apr, 2020, 01:20: PM
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