Chemistry
Grade-10
Easy
Question
Combustion and single-replacement reactions are __________ redox reactions.
- Always
- Never
- Sometimes
- Mostly
Hint:
Oxidation is lose of electron and reduction is gain of electron.
The correct answer is: Always
Redox reactions are oxidation-reduction chemical reactions in which the reactants undergo a change in their oxidation states. The term ‘redox’ is a short form of reduction-oxidation. A redox reaction involves the transfer of electrons from one species to another. In a redox reaction, the oxidation state of two species changes, with one being reduced and the other one being oxidized.
Combustion and single-replacement reactions are always redox reactions.
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