EASY
7th CBSE
IMPORTANT
Earn 100

Identify the following as physical or chemical change.

Burning of kerosene oil in a stove.

50% studentsanswered this correctly

Important Questions on Physical and Chemical Changes

MEDIUM
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q VI

Identify the following as physical or chemical change.

Beating gold into thin foil.

EASY
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q VI

Identify the following as physical or chemical change.

Melting of ghee.

MEDIUM
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q VII
When dilute sulphuric acid or vinegar is added to washing soda, bubbles of a colourless gas are formed. What type of change is it? Explain.
MEDIUM
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q VII
Identify both the physical and chemical changes which take place, when a candle is lighted.
MEDIUM
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q VII
Setting of milk into curd is a chemical change. Justify the statement by giving three reasons.
EASY
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q VII
Explain why tearing a newspaper and burning a newspaper are two different kinds of changes.
MEDIUM
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q VII
It has been noticed that rusting of iron objects is faster in coastal areas than in the deserts. Explain.
MEDIUM
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q VII
Describe as clearly as possible, how will you obtain pure crystals of copper sulphate from the impure copper sulphate.