MEDIUM
9th ICSE
IMPORTANT
Earn 100

What do you understand by a precipitation reaction? Explain with an example. 

Important Questions on Chemical Changes and Reactions

EASY
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 2 - Chemical Changes and Reactions>EXERCISE 2(B)>Q 8
What are double displacement reactions? 
EASY
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 2 - Chemical Changes and Reactions>EXERCISE 2(B)>Q 8

Give an example of a double displacement reaction, where gas is evolved.

EASY
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 2 - Chemical Changes and Reactions>EXERCISE 2(B)>Q 9

What is a decomposition reaction? 

MEDIUM
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 2 - Chemical Changes and Reactions>EXERCISE 2(B)>Q 9

Decomposition reactions can occur by heat. Give two balanced equations for it. 

MEDIUM
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 2 - Chemical Changes and Reactions>EXERCISE 2(B)>Q 9
Decomposition reactions can occur by electricity. Give two balanced equations for it. 
MEDIUM
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 2 - Chemical Changes and Reactions>EXERCISE 2(B)>Q 9
Decomposition reactions can occur by sunlight. Give two balanced equations for it.
EASY
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 2 - Chemical Changes and Reactions>EXERCISE 2(B)>Q 10

State the type of reaction for the following equation and balance if it is not balanced. 

Cl2+2KBr→2KCl+Br2

EASY
9th ICSE
IMPORTANT
Concise Chemistry Class 9>Chapter 2 - Chemical Changes and Reactions>EXERCISE 2(B)>Q 10

State the type of reaction for the following equation and balance if it is not balanced. 

NaOH+HCl →NaCl+H2O