Given the balanced equation representing a reaction:
fe2o3 + 2al--> al2o3 + 2fe
during this reaction, the oxidation number of fe changes from
(1) +2 to 0 as electrons are transferred
(2) +2 to 0 as protons are transferred
(3) +3 to 0 as electrons are transferred
(4) +3 to 0 as protons are transferred

(3) +3 to 0 as electrons are transferred

Explanation: Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

For the given reaction:

On reactant side:

Oxidation state of iron = +3

Oxidation state of aluminium = 0

On product side:

Oxidation state of iron = 0

Oxidation state of aluminium = +3

The oxidation state of iron reduces from +3 to 0, it is getting reduced and it undergoes reduction reaction.

it would be a gas formation

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?