Are all physical changes reversible?

Important Questions on Changes Around Us

HARD

6th CBSE

IMPORTANT

Science Booster>Chapter 6 - Changes Around Us>PRACTICE TIME>Q 4

Which new substances are formed on burning wood?

HARD

6th CBSE

IMPORTANT

Science Booster>Chapter 6 - Changes Around Us>PRACTICE TIME>Q 5

Are all chemical changes irreversible?

MEDIUM

6th CBSE

IMPORTANT

Science Booster>Chapter 6 - Changes Around Us>PRACTICE TIME>Q 1

What do you understand by a reversible change? Give an example.

MEDIUM

6th CBSE

IMPORTANT

Science Booster>Chapter 6 - Changes Around Us>PRACTICE TIME>Q 2

What do you understand by an irreversible change? Give an example.

MEDIUM

6th CBSE

IMPORTANT

Science Booster>Chapter 6 - Changes Around Us>PRACTICE TIME>Q 3

What is a physical change? Give an example.

MEDIUM

6th CBSE

IMPORTANT

Science Booster>Chapter 6 - Changes Around Us>PRACTICE TIME>Q 4

What is a chemical change? Give an example.

HARD

6th CBSE

IMPORTANT

Science Booster>Chapter 6 - Changes Around Us>PRACTICE TIME>Q 5

Burning of candle is both a physical as well as a chemical change. How?

HARD

6th CBSE

IMPORTANT

Science Booster>Chapter 6 - Changes Around Us>PRACTICE TIME>Q 6

What happens when lemon juice is mixed with baking powder? Is it a physical or chemical change? Justify your answer.