EASY
7th CBSE
IMPORTANT
Earn 100

 Rusting is the change of _____.

50% studentsanswered this correctly

Important Questions on Physical and Chemical Changes

EASY
7th CBSE
IMPORTANT
New Science Ahead>Chapter 6 - Physical and Chemical Changes>Exercises>Q 10
The browning of cut surfaces of fruits is similar to _____.
EASY
7th CBSE
IMPORTANT
New Science Ahead>Chapter 6 - Physical and Chemical Changes>Exercises>Q 1
How many elements are known at present?
EASY
7th CBSE
IMPORTANT
New Science Ahead>Chapter 6 - Physical and Chemical Changes>Exercises>Q 3
The properties of compounds are different from the properties of their constituent _____.
MEDIUM
7th CBSE
IMPORTANT
New Science Ahead>Chapter 6 - Physical and Chemical Changes>Exercises>Q 4

What kind of change is melting of wax ?

EASY
7th CBSE
IMPORTANT
New Science Ahead>Chapter 6 - Physical and Chemical Changes>Exercises>Q 7

Write the chemical formulae of calcium carbonate. 

EASY
7th CBSE
IMPORTANT
New Science Ahead>Chapter 6 - Physical and Chemical Changes>Exercises>Q 8
CuSO4 is the chemical formula for _____.
EASY
7th CBSE
IMPORTANT
New Science Ahead>Chapter 6 - Physical and Chemical Changes>Exercises>Q 1
An element is made of only one kind of atom.
EASY
7th CBSE
IMPORTANT
New Science Ahead>Chapter 6 - Physical and Chemical Changes>Exercises>Q 2
Carbon dioxide is made of carbon and oxygen.