EASY
9th Maharashtra Board
IMPORTANT
Earn 100

Which diseases are caused by artificial food colours?

Important Questions on Substances in Common Use

MEDIUM
9th Maharashtra Board
IMPORTANT
Science and Technology Standard Nine>Chapter 14 - Substances in Common Use>Exercises>Q 3

Where in the industrial field is radioactivity used?

MEDIUM
9th Maharashtra Board
IMPORTANT
Science and Technology Standard Nine>Chapter 14 - Substances in Common Use>Exercises>Q 3

Write down properties of teflon.

EASY
9th Maharashtra Board
IMPORTANT
Science and Technology Standard Nine>Chapter 14 - Substances in Common Use>Exercises>Q 3
What type of colours will you use to celebrate eco friendly Rang Panchami? Why?
EASY
9th Maharashtra Board
IMPORTANT
Science and Technology Standard Nine>Chapter 14 - Substances in Common Use>Exercises>Q 3
Why has the use of methods like Teflon coating become more common?
MEDIUM
9th Maharashtra Board
IMPORTANT
Science and Technology Standard Nine>Chapter 14 - Substances in Common Use>Exercises>Q 4

Give scientific explanation:

Bleaching powder has the odour of chlorine.

MEDIUM
9th Maharashtra Board
IMPORTANT
Science and Technology Standard Nine>Chapter 14 - Substances in Common Use>Exercises>Q 4

Give scientific explanation:

The hard water of a well becomes soft on adding washing soda to it.

MEDIUM
9th Maharashtra Board
IMPORTANT
Science and Technology Standard Nine>Chapter 14 - Substances in Common Use>Exercises>Q 4

Give scientific explanation

Soap forms a precipitate in hard water.

MEDIUM
9th Maharashtra Board
IMPORTANT
Science and Technology Standard Nine>Chapter 14 - Substances in Common Use>Exercises>Q 4

Give scientific explanation:

The particles of powder are given an electric charge while spraying them to form the powder coating.