Define chemical and physical change
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Posted by Kanishka Pandey 5 years, 5 months ago
- 2 answers
Gaurav Seth 5 years, 5 months ago
Physical changes
The changes in which no new substance are formed,are called physical changes. In a physical change,the substances involved do not change their identity.They can be easily returned to their original form by some physical changes. For Ex:Freezing of water,Boiling of water,Condensation of steam,Making a solution,Glowing of electric bulb,stretching of rubber band,cutting or tearing a piece of paper etc.
Chemical Changes
The changes in which new substance are formed,are called chemical changes. In a chemical change,the substances involved change their identity ie they get converted into entirely new substance. For Ex:Burning of magnesium ribbon,Rusting of iron,Formation of curd from milk,Cooking of food etc
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Sangeeta Kumari 5 years, 5 months ago
1Thank You