MEDIUM
9th Tamil Nadu Board
IMPORTANT
Earn 100

Explain Tyndall effect and Brownian movement with suitable diagram.

Important Questions on Matter Around Us

HARD
9th Tamil Nadu Board
IMPORTANT
Science Standard 9>Chapter 10 - Matter Around Us>activity 4>Q 1
Identify whether the given substance is mixture or compound and justify your answer.1.Sand and water 2.Sand and iron filings 3. Concrete 4. Water and oil 5. Salad 6. Water 7. Carbon dioxide 8. Cement 9. Alcohol.
MEDIUM
9th Tamil Nadu Board
IMPORTANT
Science Standard 9>Chapter 10 - Matter Around Us>test yourself>Q 2
Why ocean is blue?
EASY
9th Tamil Nadu Board
IMPORTANT
Science Standard 9>Chapter 10 - Matter Around Us>textbook exercises>Q i
Among the following _____  is a mixture.
EASY
9th Tamil Nadu Board
IMPORTANT
Science Standard 9>Chapter 10 - Matter Around Us>textbook exercises>Q i
_____ has the same properties throughout the sample.
EASY
9th Tamil Nadu Board
IMPORTANT
Science Standard 9>Chapter 10 - Matter Around Us>textbook exercises>Q ii

State whether true or false. If false, correct the statement.

Aspirin is composed of 60% Carbon,  4.5% Hydrogen and 35.5% Oxygen by mass. Aspirin is a mixture.

MEDIUM
9th Tamil Nadu Board
IMPORTANT
Science Standard 9>Chapter 10 - Matter Around Us>textbook exercises>Q vi
Which of the following are pure substances? Ice, Milk, Iron, Hydrochloric acid, Mercury, Brick and Water.
EASY
9th Tamil Nadu Board
IMPORTANT
Science Standard 9>Chapter 10 - Matter Around Us>textbook exercises>Q vi
Oxygen is very essential for us to live. It forms 21% of air by volume. Is it an element or compound?
HARD
9th Tamil Nadu Board
IMPORTANT
Science Standard 9>Chapter 10 - Matter Around Us>textbook exercises>Q vii
How is a mixture of common salt, oil and water separated? You can use a combination of different methods.