MEDIUM
6th CBSE
IMPORTANT
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The melting of wax is an irreversible change.

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Important Questions on Changes Around Us

MEDIUM
6th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Changes Around Us>Looking Back>Q 1
The melting of wax is an irreversible change.
EASY
6th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Changes Around Us>Looking Back>Q 2
The burning of paper is an example of a reversible physical change.
EASY
6th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Changes Around Us>Looking Back>Q 3
Expansion of metals when heated is a irreversible change.
EASY
6th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Changes Around Us>Looking Back>Q 3
The burning of a candle shows both physical and chemical changes.
EASY
6th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Changes Around Us>Exercises>Q 9

Which of these changes are physical and irreversible?

(i) folding of cloths.

(ii) melting of butter.

(iii) breaking of glass.

(iv) chopping of wood.

EASY
6th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Changes Around Us>Exercises>Q 4
Breaking of eggs is a/an _____ change.
EASY
6th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Changes Around Us>Exercises>Q 5
The switching on of a fan is a reversible physical change.
HARD
6th CBSE
IMPORTANT
New Science Ahead>Chapter 7 - Changes Around Us>Exercises>Q 1
State four characteristics each of physical and chemical changes.