Which of the following are chemical changes?

(a) Growth of a plant

(b) Rusting of iron

(c) Mixing of iron filings and sand

(d) Cooking of food

(e) Digestion of food

(f) Freezing of water

(g) Burning of a candle.

 

Answer

Physical Change - A change in which no new substance is formed is called Physical Change

These changes are reversible.

 

Examples of Physical Changes

 

 

Chemical Change - A change in which new substances are formed is called Chemical Change

These changes are normally irreversible

The following are chemical changes

(a) Growth of a plant

(b) Rusting of iron

(d) Cooking of food

(e) Digestion of food

(g) Burning of a candle.

 

Examples of Chemical changes

 

 




  1. Class 9
  2. Chapter 2 Class 9 - Is Matter Around Us Pure

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.