HARD
10th ICSE
IMPORTANT
Earn 100

With the help of an activity, show that the reaction between calcium oxide (lime) and water is an exothermic reaction. 

Important Questions on Chemical Reactions and Equations

HARD
10th ICSE
IMPORTANT
Science Chemistry>Chapter 1 - Chemical Reactions and Equations>ASSESSMENT>Q 29
With the help of an activity, show that photodecomposition is an endothermic reaction. 
HARD
10th ICSE
IMPORTANT
Science Chemistry>Chapter 1 - Chemical Reactions and Equations>ASSESSMENT>Q 30
With the help of an activity, explain the decomposition of H2O. 
HARD
10th ICSE
IMPORTANT
Science Chemistry>Chapter 1 - Chemical Reactions and Equations>ASSESSMENT>Q 31
With the help of an activity, show that iron is more reactive than copper. 
MEDIUM
10th ICSE
IMPORTANT
Science Chemistry>Chapter 1 - Chemical Reactions and Equations>ASSESSMENT>Q 32

When a metal rod is immersed in an aqueous copper sulphate solution, the blue colour of the solution changes to pale green. What is the metal with which the rod is made up of? 

MEDIUM
10th ICSE
IMPORTANT
Science Chemistry>Chapter 1 - Chemical Reactions and Equations>ASSESSMENT>Q 33

Explain two effects of oxidation reactions in everyday life. 

HARD
10th ICSE
IMPORTANT
Science Chemistry>Chapter 1 - Chemical Reactions and Equations>ASSESSMENT>Q 1
How can a balanced chemical equation be made more informative? Explain with examples. 
MEDIUM
10th ICSE
IMPORTANT
Science Chemistry>Chapter 1 - Chemical Reactions and Equations>ASSESSMENT>Q 2

Write balanced chemical equations for the following word equation: 

Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water.

MEDIUM
10th ICSE
IMPORTANT
Science Chemistry>Chapter 1 - Chemical Reactions and Equations>ASSESSMENT>Q 2

Write the balanced chemical equation for the following word equation: 

Phosphorus pentachloride + Water → Phosphoric acid + Hydrogen chloride.