EASY
7th CBSE
IMPORTANT
Earn 100

Statement given below are incorrect. Write the correct statements.

Magnetisation of steel is a chemical change.

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 III

Statement given below are incorrect. Write the correct statements.

Rusting can be stopped by adding metals like aluminium and copper to iron.

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

Statement given below are incorrect. Write the correct statements.

Crystallisation is the process used to make impure substances from pure substances.

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

Statement given below are incorrect. Write the correct statements.

Lime water turns milky in presence of carbon dioxide gas due to the formation of calcium sulphate.

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

Statement given below are incorrect. Write the correct statements.

The reaction between magnesium and oxygen produces heat and sound energy.

EASY
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q IV
Cooking of rice is a physical change.
EASY
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q IV
Rusting of iron takes place in the presence of moist air.
MEDIUM
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q IV
Magnesium oxide reacts with water to form magnesium hydroxide which is acidic in character.
EASY
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 6 - Physical and Chemical Changes>EXERCISES>Q IV
When bread goes stale, a physical change takes place.