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Physical and Chemical Changes

A change in w...

Question

A change in which the substance can get back to its original form is called a physical change. Which of the following is a physical change?

A

Burning of paper

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B

Bursting of crackers

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C

Cooking of food

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D

Melting of ice

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Solution

The correct option is D Melting of ice
Physical change is a change in which nothing new is formed. It is a change which only affects the form of a substance, but not it's chemical composition. Such kind of change is reversible. For example melting of ice, freezing of water etc.

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A physical change is a change that involves only a change in the physical state of matter. Its chemical properties remain the same. Usually increasing the temperature or applying pressure or both bring about a physical change. On reversing the condition, that is reducing the temperature or reducing the pressure or both, the original state of matter is restored. In other words, physical changes are reversible.

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