EASY
9th ICSE
IMPORTANT
Earn 100

Identify the type of chemical reaction taking place.

Iron nails when left dipped in blue copper sulphate solution become brownish in colour and the blue colour of copper sulphate fades away.

Important Questions on Chemical Changes and Reactions

EASY
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 2 - Chemical Changes and Reactions>EXAM PRACTICE>Q 36

Identify the type of chemical reaction taking place when quicklime reacts vigorously with water releasing a large amount of heat.

MEDIUM
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 2 - Chemical Changes and Reactions>EXAM PRACTICE>Q 37
You are provided with two containers made up of copper and aluminium. You are also provided with solutions of dilute HCl, dilute HNO3, ZnCl2 and H2O. In which of the above containers these solutions can be kept?
EASY
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 2 - Chemical Changes and Reactions>CHAPTER EXERCISE>Q 1
The positions of copper is _____ to that of hydrogen in the activity series.
EASY
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 2 - Chemical Changes and Reactions>CHAPTER EXERCISE>Q 2
_____ is a pigment, found in plants which helps in photosynthesis by entrapping the light energy.
MEDIUM
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 2 - Chemical Changes and Reactions>CHAPTER EXERCISE>Q 3
_____ gas is released during respiration.
EASY
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 2 - Chemical Changes and Reactions>CHAPTER EXERCISE>Q 4
During endothermic reaction, energy is _____.
EASY
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 2 - Chemical Changes and Reactions>CHAPTER EXERCISE>Q 5
Close contact of reacting substances during a chemical reaction is required for the exchange of 
EASY
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 2 - Chemical Changes and Reactions>CHAPTER EXERCISE>Q 6

AgNO3(aq) +NaCl (aq) → AgCl(s) + NaNO3(aq)

The above reaction is