write an activity to show different properties of mixtures and compounds

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Solution

1. The activity is as follows:

(a) Mix and crush iron filings and sulphur powder.
(b) Mix and crush iron filings and sulphur powder. Heat this mixture strongly till red hot. Remove from flame and let the mixture cool.

2. Now study the properties of the above two systems.

3. Conclusion: (i) System 1 is a mixture.
(ii) System 2 is a compound.

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Few properties are mentioned below. Specify the property as mixture or compounds:

STATEMENT 1: The constituents can be separated easily by physical means.

STATEMENT 2: Has a variable composition.

STATEMENT 3: The composition is constant.

STATEMENT 4: Shows entirely different properties from those of the constituents.

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