EASY
Stage 1 & 2
IMPORTANT
Earn 100

The colour of copper oxide is

50% studentsanswered this correctly

Important Questions on Chemical Reactions and Equations

MEDIUM
Stage 1 & 2
IMPORTANT
Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Chemical Reactions and Equations>Target Exercise>Q 7
In exothermic reaction, heat is
MEDIUM
Stage 1 & 2
IMPORTANT
Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Chemical Reactions and Equations>Target Exercise>Q 8
The precipitate formed when copper sulphate reacts with hydrogen sulphide
EASY
Stage 1 & 2
IMPORTANT
Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Chemical Reactions and Equations>Target Exercise>Q 9
Carbon burns with oxygen to form
MEDIUM
Stage 1 & 2
IMPORTANT
Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Chemical Reactions and Equations>Target Exercise>Q 10
Calcium oxide and carbon dioxide are formed due to the decomposition of 
MEDIUM
Stage 1 & 2
IMPORTANT
Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Chemical Reactions and Equations>Target Exercise>Q 1

Fe2O3+2Al→Al2O3+2Fe

The above reaction is an example of a 

MEDIUM
Stage 1 & 2
IMPORTANT
Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Chemical Reactions and Equations>Target Exercise>Q 2

Which of the statements about the reaction below are incorrect?

2PbOs+Cs→2Pbs+CO2g

1. Lead is getting reduced

2. Carbon dioxide is getting oxidised

3. Carbon is getting oxidised

4. Lead oxide is getting reduced

EASY
Stage 1 & 2
IMPORTANT
Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Chemical Reactions and Equations>Target Exercise>Q 3
On burning magnesium in the air, we get
EASY
Stage 1 & 2
IMPORTANT
Target NTSE Class 10 Stage 1 & 2 Solved Papers (2015 – 19)>Chapter 3 - Chemical Reactions and Equations>Target Exercise>Q 4
The metal that can displace Fe from its salt is