If a liquid compound decomposes at its boiling point, which method $(s)$ can you choose for its purification. It is known that the compound is stable at low pressure, steam volatile and insoluble in water.

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Solution

Steam distillation technique is applied to separate substances which are steam volatile and are immiscible with water. It is often used to purify liquids that decompose at boiling point.

The given compound is steam volatile, insoluble in water and decomposes at its boiling point. So, steam distillation techniques will be used for purification.

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Q. Which purification technique is used for high boiling organic liquid compound (decomposes near its boiling point )?

A liquid with high boiling point decomposes on simple distillation but it can be steam distilled for its purification. Explain how is it possible?

Match the type of mixture of compounds in Column I with the technique of separation / purification given in Column II.

	Column I		Column II
A	Two solids which have different solubilities in a solvent and which do not undergo reaction when dissolved in it	$(i)$	Steam distillation
B	Liquid that decomposes at its boiling point	$(i i)$	Fractional distillation
C	Steam volatile liquid	$(i i i)$	Simple distillation
D	Two liquids which have boiling points close to each other	$(i v)$	Distillation under reduced pressure
E	Two liquids with large difference in boiling points.	$(v)$	Crystallization

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If a liquid compound decomposes at its boiling point, which method (s) can you choose for its purification. It is known that the compound is stable at low pressure, steam volatile and insoluble in water.

If a liquid compound decomposes at its boiling point, which method $(s)$ can you choose for its purification. It is known that the compound is stable at low pressure, steam volatile and insoluble in water.