HARD
7th CBSE
IMPORTANT
Earn 100

What is a displacement reaction? Why is it a chemical reaction? Explain with an example.

Important Questions on Physical And Chemical Changes

HARD
7th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 2 - Physical And Chemical Changes>EXERCISE>Q 3
State five differences between a physical and a chemical change.
HARD
7th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 2 - Physical And Chemical Changes>EXERCISE>Q 4

Define the following chemical reaction and give an example of it.

Exothermic reaction

HARD
7th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 2 - Physical And Chemical Changes>EXERCISE>Q 4

Define the following chemical reaction and give an example of it.

Oxidation reaction

HARD
7th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 2 - Physical And Chemical Changes>EXERCISE>Q 4

Define the following chemical reaction and give an example of it.

Combination reaction

HARD
7th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 2 - Physical And Chemical Changes>EXERCISE>Q 4

Define the following chemical reaction and give an example of it.

Reduction reaction

HARD
7th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 2 - Physical And Chemical Changes>EXERCISE>Q 4

Define the following chemical reaction and give an example of it.

Decomposition reaction

HARD
7th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 2 - Physical And Chemical Changes>EXERCISE>Q 5
With an activity explain burning of magnesium in air. What is the compound formed after burning of magnesium? What happens when this compound is dissolved in water?
MEDIUM
7th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 2 - Physical And Chemical Changes>EXERCISE>Q 1

Out of the following, the number of properties which change during a physical change is:

Shape, size, state, chemical composition.