Question

Mixture of sand and iron filings is heterogeneous mixture give reason

Answer 1

A heterogeneous mixture is simply any mixture that is not uniform in composition. If we take many parts of this mixture, they will have different amounts of iron fillings and sand(i.e. b on uniform composition). Hence it is a heterogeneous mixture.

Answer 2

As there is a physical boundary between the sand and iron filings.

Explanation:

Homogeneous mixtures: It is a mixture that has uniform composition throughout the solution and the particle size or shapes are not different. There is no physical boundary between the dispersed phase and dispersion medium. Example: sugar dissolved in water.

Heterogeneous mixtures: It is a mixture that has non-uniform composition throughout the solution and the particle size or shapes are also different. There is a physical boundary between the dispersed phase and dispersion medium. Example: sand and iron fillings

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