Physical and Chemical Changes

Question 1

________ is a law of nature.

Answer 1

Change

Question 2

What are the types of changes?

Answer 2

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Question 3

Differenciate between Slow and Fast changes.

Answer 3

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Question 4

Differenciate between Desirable and Undesirable changes.

Answer 4

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Question 5

Differenciate between Periodic and Non-Periodic changes.

Answer 5

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Question 6

Differenciate between Reversible and Irreversible changes.

Answer 6

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Question 7

Define Physical Changes.

Answer 7

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Question 8

Enlist the characteristics of Physical Changes.

Answer 8

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Question 9

Mention 3 examples of Physical Changes.

Answer 9

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Question 10

Define Chemical Changes.

Answer 10

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Question 11

Enlist the characteristics of Chemical Changes.

Answer 11

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Question 12

Mention 3 examples of Chemical Changes.

Answer 12

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Question 13

Differenciate between Physical and Chemical changes.

Answer 13

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Question 14

Define Endothermic Changes

Answer 14

Changes that proceed with absorption of heat energy are called endothermic changes.

Question 15

Define Exothermic Changes

Answer 15

Changes that proceed with release of heat energy are called endothermic changes.

Question 16

Give an example of Evolution of gas.

Question 17

Give an example of Change in colour.

Question 18

Give an example of Formation of precipitate.

Question 19

Give an example of Change in state.

Question 20

Give an example of Endothermic reactions.

Question 21

Give an example of Exothermic reactions.