EASY
Stage 1 & 2
IMPORTANT
Earn 100

When iron reacts with copper sulphate to form ferrous sulphate and copper in this reaction change of colour occurs from

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Important Questions on Chemical Reactions and Equations

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 7
Redox reactions are useful in 
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
When a copper vessel is exposed to moist air for a long time, it acquires a dull green coating. This is due to the
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
Calcium hydroxide reacts slowly with the carbon dioxide in the air to form a thin layer 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 10
Lead nitrate on thermal decomposition gives lead oxide, _______ and _______.
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 11
Food containing fats and oil usually contain ______ to prevent oxidation.
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 12
Which of the following is not a chemical change?
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 13
Which of the following is a reversible reaction?
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 14
Calcium oxide is commonly named as