Question

Which of the following processes is not a chemical
change?
(1) Rusting (2) Crystallization
(3) Digestion (4) Neutralisation

Answer 1

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"Crystallization" processes is not a chemical change.

Answer 2

Crystallisation is not a chemical change.

• The process where we can not get back the initial product is called a chemical change.
• Rusting is formed on iron in the reaction of iron with oxygen and water. We can not get back the actual iron so, it is a chemical change.
• Digestion digests the foods and we can not get back the food so, it is a chemical change.
• Naturalisation neutralises acid and bases so, it is a chemical change.
• In crystallisation, the crystal can give the original product by dilution and other methods. So, it is not a chemical change.
• Hence the correct option is 2.