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PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoAny substance that changes its chemical properties is known as chemical change. In this change, a new substance is formed, and these changes are irreversible (i.e. they cannot be brought back to their original form) in nature. These changes are permanent.
Example:
Burning of candle
Rusting of iron
Burning of paper
Burning of matchstick
Formation of curd from milk
Cooking a food
Heating sugar to form a caramel, etc.
Rusting of iron
Burning of paper
Burning of matchstick
Formation of curd from milk
Cooking a food
Heating sugar to form a caramel, etc.
Bursting a balloon: If a balloon is blown to its full size and pricked with the pointed tip of a pencil or needle, it cannot regain its original form.
![BeFunky-collage (9).jpg](https://resources.cdn.yaclass.in/eb3f40db-f68c-4520-8a56-514b53a7d4b4/BeFunkycollage9w400.jpg)
Bursting a balloon
Burning of a matchstick: When the matchstick is burned, it turns into ashes when it undergoes complete combustion. The ashes have an entirely new chemical composition than that of the unburnt matchstick.
![BeFunky-collage (9).jpg](https://resources.cdn.yaclass.in/fcd7be03-12c8-4432-9891-581268761cce/BeFunkycollage9w400.jpg)
Burning of matchstick
Baking a roti: When the dough is baked into a roti, it cannot be changed into a dough again. These changes cannot be reversed.
![BeFunky-collage (20).jpg](https://resources.cdn.yaclass.in/86f71a08-0a62-4316-a4e5-72c8e11d97ca/BeFunkycollage20w400.jpg)
Baking a roti
Pot making: A potter makes a pot using a lump of clay. The shaped pot can be rolled again into a lump which is a reversible process. But, when the same pot is baked in an oven, it cannot be shaped into a lump of clay again. So, this process becomes irreversible.
![BeFunky-collage (19).jpg](https://resources.cdn.yaclass.in/2e7e1ba4-b94e-4b63-904a-a321cd05b965/BeFunkycollage19w400.jpg)
Pot making