Classify the following as homogeneous and heterogeneous mixtures:
i. sodium chloride in water
ii. glucose in water
iii. sand and water
iv. air

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Solution

Homogenous mixture Heterogeneous mixture
Homogeneous mixtures are types of mixtures in which components are present uniform throughout and we can not distinguish the components present in that mixture physically.
These particles do not show the Tyndall effect.
The constituent particles cannot be separated by using centrifugation or decantation.
Examples: air, sodium chloride in water, glucose in water
Heterogeneous mixtures are types of mixtures in which components are not present uniform throughout.
The particles show a Tyndall effect.
Example: Sand and water

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Homogenous mixture	Heterogeneous mixture
Homogeneous mixtures are types of mixtures in which components are present uniform throughout and we can not distinguish the components present in that mixture physically. These particles do not show the Tyndall effect. The constituent particles cannot be separated by using centrifugation or decantation. Examples: air, sodium chloride in water, glucose in water	Heterogeneous mixtures are types of mixtures in which components are not present uniform throughout. The particles show a Tyndall effect. Example: Sand and water