EASY
7th CBSE
IMPORTANT
Earn 100

A  change is also called a chemical reaction.

(Clues- reversible, chemical, physical, air, chemical)

50% studentsanswered this correctly

Important Questions on Changes Around Us

EASY
7th CBSE
IMPORTANT
SCIENCE ROUTE 7>Chapter 9 - Changes Around Us>EXERCISES>Q II

Rusting of iron takes place in the presence of moisture and _____.

(Clues- reversible, chemical, physical, air, chemical)

MEDIUM
7th CBSE
IMPORTANT
SCIENCE ROUTE 7>Chapter 9 - Changes Around Us>EXERCISES>Q II

Formation of manure from leaves is a _____ change. 

(Clues- reversible, chemical, physical, air, chemical)

EASY
7th CBSE
IMPORTANT
SCIENCE ROUTE 7>Chapter 9 - Changes Around Us>EXERCISES>Q II

A physical change is a _____ change.

(Clues- reversible, chemical, irreversible)

EASY
7th CBSE
IMPORTANT
SCIENCE ROUTE 7>Chapter 9 - Changes Around Us>EXERCISES>Q III
Is a physical change temporary or permanent? 
MEDIUM
7th CBSE
IMPORTANT
SCIENCE ROUTE 7>Chapter 9 - Changes Around Us>EXERCISES>Q III
Name the kind of change in rusting of iron.
MEDIUM
7th CBSE
IMPORTANT
SCIENCE ROUTE 7>Chapter 9 - Changes Around Us>EXERCISES>Q III
Name the method which can prevent rusting.
MEDIUM
7th CBSE
IMPORTANT
SCIENCE ROUTE 7>Chapter 9 - Changes Around Us>EXERCISES>Q III
In which change heat is absorbed or given out? 
EASY
7th CBSE
IMPORTANT
SCIENCE ROUTE 7>Chapter 9 - Changes Around Us>EXERCISES>Q III
What is the chemical symbol for iron ?