Why do oxidation and reduction reactions always occur together in chemical changes?
One substance loses what another gains
Oxidation is loss of electrons (or gain of oxygen) and reduction is gain of electrons (or loss of oxygen).
The electrons lost by the substance being oxidised must be gained by some other substance, which is thereby reduced, so the two half-reactions cannot occur alone.
Hence, the answer is One substance loses what another gains.
Similar Questions
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Balance the following reaction:
\(3\,\text{MnO}_2\,(s) + x\,\text{Al}\,(s) \rightarrow 3\,\text{Mn}\,(l) + y\,\text{Al}_2\text{O}_3\,(s) + \text{Heat}\)
What type of ions exchange between reactants in a double displacement reaction?
Which of the following is a chemical change?
What is generally produced when a metal reacts with an acid?
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The gas evolved when calcium reacts with water is:
When hydrochloric acid reacts with sodium hydroxide to form sodium chloride and water, which type of reaction is primarily demonstrated?
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Fe + H2O4 → Fe3O4 + H2
Which statement best explains why this step is INCORRECT?
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Important Questions from Chemical Reaction
Which of the following statement is/are true?
I. In physical change new substance is formed. substance is formed.
II. In chemical change no new substance is formed.
Which of the following cells involves similar chemical reactions?
The information not obtained from balanced chemical equation is
Oxygen cannot be obtained by which one of the following methods?
Which of the following compound is responsible for tarnishing of silver?
