Chemistry
Grade-10
Easy

Question

Combustion and single-replacement reactions are __________ redox reactions.

  1. Always
  2. Never
  3. Sometimes
  4. Mostly

hintHint:

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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