Define:
(i) a physical change

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Solution

A physical change is a change in which a substance alters temporarily in some or all of the physical properties such as size, state, shape, appearance, etc. but not its chemical composition. It is a temporary change and no new substance is formed during a physical change.

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Define :

(a) a physical change

(b) a chemical change

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Q. Define physical and chemical change and give two suitable examples for each.

Q. (i) What is a physical change? Write some examples.
(ii) What are the characteristic of physical change?

(i) Physical changes are easily reversible. (ii) Physical change does not produce new substance (iii) Physical change does not involve change in mass. Which of the following statement is correct?

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Slow Changes and Fast Changes

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Define: (i) a physical change

A physical change is a change in which a substance alters temporarily in some or all of the physical properties such as size, state, shape, appearance, etc. but not its chemical composition. It is a temporary change and no new substance is formed during a physical change.

Define:
(i) a physical change