Question

Compare the mung beans, talcum powder and common salt. What difference
between them would you use to separate the common salt from the mung
beans and talcum powder?​

Answer 1

Answer:

How will you separate the mixture of a common salt, chalk powder, and powdered camphor?

Add mixture to a quantity of water sufficient to dissolve the salt. The salt will dissolve, the chalk powder will sink and the camphor will float as its density (0.99 gram/cm3) is slightly less than water’s and certainly less than that of salt water.

Using a fine sieve skim off the floating camphor and wash with distilled water on the same sieve. Place in a dust free place to dry.

Suspend the chalk in the salt water by stirring and pour through the same sieve or filter through filter paper if the chalk is too fine and wash the residue as above. Place in a dust free place to dry.

Pour the salt water into an evaporating dish and allow it to evaporate and crystallise.

This method uses the density properties of the substances only.

Explanation:

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