HARD
6th Maharashtra Board
IMPORTANT
Earn 100

Give scientific reasons for the following statement.

We must observe economy in the use of materials.

Important Questions on Substances in Daily Use

MEDIUM
6th Maharashtra Board
IMPORTANT

Give scientific reasons for the following statement.

Saving paper is the need of the hour. 
MEDIUM
6th Maharashtra Board
IMPORTANT

Give scientific reasons for the following statement.

Man-made materials have more demand.

MEDIUM
6th Maharashtra Board
IMPORTANT

Give scientific reasons for the following statement.

Humus is a natural material.

HARD
6th Maharashtra Board
IMPORTANT
How is lac obtained from nature?
HARD
6th Maharashtra Board
IMPORTANT
How are pearls obtained?