]in the chemical reaction shown below, which element was oxidized? 4fe + 3o2 yields 2fe2o3 fe, because it gained 3 electrons fe, because it lost 3 electrons o, because it gained 2 electrons o, because it lost 2 electrons

Answer : The correct option is, Fe because it lost 3 electrons.

Explanation :

Redox reaction or Oxidation-reduction reaction : It is defined as the reaction in which the oxidation and reduction reaction takes place simultaneously.

Oxidation reaction : It is defined as the reaction in which a substance looses its electrons. In this, oxidation state of an element increases. Or we can say that in oxidation, the loss of electrons takes place.

Reduction reaction : It is defined as the reaction in which a substance gains electrons. In this, oxidation state of an element decreases. Or we can say that in reduction, the gain of electrons takes place.

The given balanced chemical reaction is :

The oxidation-reduction half reaction will be :

Oxidation :

Reduction :

In this reaction, the oxidation state of 'Fe' changes from (0) to (+3) that means Fe lost 3 electrons and it shows oxidation and the oxidation state of 'O' changes from (0) to (-2) that means O gains 2 electrons and it shows reduction.

Therefore, the correct option is, Fe because it lost 3 electrons.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

it is a good conductor

explanation: