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← CBSE Class 10 PYQ
Chemical Reactions and Equations
CBSE Class 10 · Science · 31 past questions
Topic
Balancing chemical equations
1
Decomposition and products of specific reactions
1
Exothermic and endothermic reactions
1
Observations and changes in reactions
0
Oxidation, reduction and redox
0
Types of chemical reactions
0
Level
Easy
2
Moderate
1
Tough
0
Year
2026
1
2025
1
2024
0
2023
0
1 of 31 ·
show all
Q12
2025
Electrolysis of water is a decomposition reaction. The mass ratio ($M_H : M_O$) of hydrogen and oxygen gases…
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