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Crystallisation

Crystallisati...

Question

Crystallisation is a chemical change.

A

True

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B

False

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Solution

The correct option is B False
Crystallisation is the process of separating a soluble solid from the solution by heating or evaporating the solvent.
It is a physical change as no new substance is formed.

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Similar questions

Q. Crystallisation is an example of chemical change.

Q. Fill in the blanks:
1. ........................ is hydrated ferric oxide.
2. ........................ is used for galvanising iron.
3. We get ........................ by the process of crystallisation.
4. A chemical change is usually ........................ and permanent.
5. All chemical changes involve ........................ or ........................ of energy.

Q. Match the columns:

	I		II
(a)	Physical change	(i)	Curdling of milk
(b)	Chemical change	(ii)	Demagnetisation of magnets
		(iii)	Digestion of food
		(iv)	Crystallisation of substance
		(v)	Rusting of iron

Q. Write True (T) or False (F) against the following statements in the given brackets:
1. Souring of milk is a physical change. ( )
2. Digestion of food is a physical change. ( )
3. Crystallisation is widely used to prevent rusting. ( )
4. Formation of steam from water on heating is a physical change. ( )
5. Glowing of the filament of a bulb is an example of a chemical change. ( )

Crystallisation of copper sulphate is a physical change.

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