Q 10.     Classify the following into elements, compounds and mixtures.

             (a) Sodium

             (b) Soil

             (c) Sugar solution

             (d) Silver

             (e) Calcium carbonate

             (f) Tin

             (g) Silicon

             (h) Coal

             (i) Air

            (j) Soap

            (k) Methane

            (l) Carbon dioxide

            (m) Blood

Answers (1)

Elements cannot be broken down into any simpler substance. and the compounds have fixed composition can be broken down into elements by chemical or electrochemical reaction. Mixtures have no fixed composition they are either homogeneous or heterogeneous.

Therefore, Sodium, Silver, Tin, and Silicon are elements.

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