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when a candle burns both physical and chemical changes take place identify these changes to give another example of a familiar process in which both the cleaning chemical and physical changes take place

Posted by Lucky Pahadiya 5 years, 4 months ago

CBSE > Class 07 > Science

4 answers

Kamalika Paul 5 years, 4 months ago

Chewing of food because when we chew our food then the size of the food has been Change which is physical property means physical change. But when the saliva mixes with the food then the food break down into sugar which is a new substance that is chemical property means chemical change. So we can say that chewing of food is both physical and chemical change.

Devansh Sharma 5 years, 4 months ago

2x = 3c = b

Divijaa Grover 5 years, 4 months ago

Burning of LPG in our kitchen is another such example in which a physical change occurs when LPG comes out of a cylinder and is converted from liquid state to gaseous state and a chemical change occurs when this gas burns in the air

Yogita Ingle 5 years, 4 months ago

In burning of candle some of the wax melts, which is physical change, while most of the wax burnt, which is a chemical change.

In the burning of wood, water present in wood changes into vapour, this is physical change, while burning of wood is a chemical change.

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