Physical Changes

Author:V K Sally & S K Aggarwal
7th CBSE
IMPORTANT

Important Questions on Physical Changes

EASY
IMPORTANT

Identify the following as physical or chemical change.

Melting of ghee.

MEDIUM
IMPORTANT

Identify the following as physical or chemical change.

Beating gold into thin foil.

EASY
IMPORTANT

Identify the following as physical or chemical change.

Glowing of electric bulb.

EASY
IMPORTANT

Identify the following as a physical change or a chemical change.

Condensation of steam.

EASY
IMPORTANT

Fill in the blank by choosing the correct word from the list given below:

List: Galvanisation, physical, calcium carbonate, new, calcium hydroxide, energy, substance, saturated, sodium carbonate, moist.

No new_____ is formed during a physical change.

EASY
IMPORTANT

A change which cannot be reversed even on reversing the cause is called :

MEDIUM
IMPORTANT

Fill in the blanks by choosing the correct words from the list given below:

List: Galvanisation, physical, calcium carbonate, new, calcium hydroxide, energy, substance, saturated, sodium carbonate, moist.

A _____ change is a temporary change.

EASY
IMPORTANT

What kind of changes takes place during the formation of snow?

EASY
IMPORTANT

What kind of changes takes place during digestion of food?

MEDIUM
IMPORTANT

The product formed when a substance dissolves in a liquid is known as:

EASY
IMPORTANT

The change in which the products can be converted back into their original form is called:

EASY
IMPORTANT

Explain why tearing a newspaper and burning a newspaper are two different kinds of changes.