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The substance that is oxidized in the reaction above is…

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CHEMISTRY

The substance that is oxidized in the reaction above is

The substance that is oxidized in the reaction above is

QUICK ANSWER…

C

DETAILS…  

Initially, you should be certain that the correct answer must be either option A or C, this is because all products should be automatically ruled out, the oxidized substance should be one of the reactants and not one of the products.

Now, A substance that is oxidized will either gain oxygen, or loss hydrogen, or lose electron(s).

Defining oxidation in terms of hydrogen, we know that oxidation is the removal of hydrogen from a compound. Proper examination of the reaction equation shows that hydrogen is removed from water and added to sodium peroxide. This means sodium peroxide is the oxidizing agent because it removed hydrogen from water, and water is oxidized because hydrogen is removed from it.

Now for the right answer to the above question:

  1. Option A is incorrect. sodium peroxide removed hydrogen from water, therefore it is the oxidizing agent. An oxidizing agent will itself be reduced.
  2. Option B is incorrect. it is one of the products, no product should be considered in this kind of question.
  3. C is correct. when hydrogen is removed from a substance, the substance will be said to have been oxidized.
  4. D is not the correct answer. This is one of the products.

QUICK TIPS…

You may please note these/this:

  • A substance that is oxidized will either gain oxygen, or lose hydrogen, or lose electron(s). Please commit this to memory.

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/ culled from 2016 JAMB-UTME Chemistry past question 10 /

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