Question

1. Which property of ice gets changed on heating?
2. Mention the process which includes both physical
and chemical change.
de changes​

Answer 1

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Explanation:

The properties of ice-

melting and freezing are involved in each change during heating and cooling.Heating of ice leads to melting of ice.

A chemical change results from a chemical reaction while a physical change is when matter changes forms but

Not chemical identity.

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Answer 2

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1: The melting of  ice takes up heat from the surroundings and it is a physical change. Formation of water droplets outside the glass tumbler due to water vapour in the air condensing on it is a physical process.

2: Melting of wax is a physical change and formation of carbon dioxide and water vapour is a chemical change. Therefore, both physical and chemical changes occur when a candle burns.

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☆ Burning of LPG in a gas stove involves both physical and chemical changes. 

☆ When LPG comes out of the cylinder it changes from liquid to gaseous state, which is physical change. Then the gas burns in the air which is a chemical change.

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