HARD
10th ICSE
IMPORTANT
Earn 100

Give the example of a combination reaction which is also an exothermic reaction. 

Important Questions on Chemical Reactions and Equations

MEDIUM
10th ICSE
IMPORTANT
Science Chemistry>Chapter 1 - Chemical Reactions and Equations>ASSESSMENT>Q 29
Why is it necessary to balance a chemical reaction? 
EASY
10th ICSE
IMPORTANT
Science Chemistry>Chapter 1 - Chemical Reactions and Equations>ASSESSMENT>Q 30

What is the significance of symbol 'aq'? 

EASY
10th ICSE
IMPORTANT
Science Chemistry>Chapter 1 - Chemical Reactions and Equations>ASSESSMENT>Q 31
What does an arrow pointing upwards in a chemical reaction indicate? 
MEDIUM
10th ICSE
IMPORTANT
Science Chemistry>Chapter 1 - Chemical Reactions and Equations>ASSESSMENT>Q 32

What is wrong with the following chemical equation? 

Mg + O →MgO 

MEDIUM
10th ICSE
IMPORTANT
Science Chemistry>Chapter 1 - Chemical Reactions and Equations>ASSESSMENT>Q 33
Name one synthetic antioxidant. 
MEDIUM
10th ICSE
IMPORTANT
Science Chemistry>Chapter 1 - Chemical Reactions and Equations>ASSESSMENT>Q 34
Aluminium is a reactive metal, yet it is used for packing food articles. Why? 
MEDIUM
10th ICSE
IMPORTANT
Science Chemistry>Chapter 1 - Chemical Reactions and Equations>ASSESSMENT>Q 35
Why is combustion reaction an oxidation reaction? 
MEDIUM
10th ICSE
IMPORTANT
Science Chemistry>Chapter 1 - Chemical Reactions and Equations>ASSESSMENT>Q 1

What is the difference between word equation and symbolic equation? Out of word equation and symbolic equation, which one is more informative?