NCERT Exemplar Solutions Class 9 Science Solutions for Matter in our Surroundings - Exercise in Chapter 1 - Matter in our Surroundings

Question 23 Matter in our Surroundings - Exercise

You are provided with a mixture of naphthalene and ammonium chloride by your teacher. Suggest an activity to separate them with a well-labelled diagram.


Naphthalene is a non-polar compound which will not dissolve in water. Similarly, ammonium chloride is a polar compound which is soluble in water. Naphthalene is volatile in room temperature whereas ammonium chloride is volatile at high temperature.

The mixture of Naphthalene and ammonium chloride can be separated by decantation of aqueous mixture. Naphthalene remains undissolved in water and can be taken out in a funnel. The filtrate of ammonium chloride can be evaporated to obtain dry ammonium chloride.

Science Exemplar Problems - class 9 chapter Matter in our Surroundings Question 23 Solution image

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