For each reaction, identify the element that gets reduced and the element that gets oxidized. 2 AgCl + Zn ⟶ 2 Ag + ZnCl 2 2AgCl+Zn⟶2Ag+ZnCl2 Identify the element that gets reduced. chlorine silver zinc Identify the element that gets oxidized. chlorine silver zinc 4 NH 3 + 3 O 2 ⟶ 2 N 2 + 6 H 2 O 4NH3+3O2⟶2N2+6H2O Identify the element that gets reduced. oxygen hydrogen nitrogen Identify the element that gets oxidized. hydrogen oxygen nitrogen Fe 2 O 3 + 2 Al ⟶ Al 2 O 3 + 2 Fe Fe2O3+2Al⟶Al2O3+2Fe Identify the element that gets reduced. aluminum oxygen iron Identify the element that gets oxidized. oxygen iron aluminum

For the first reaction

Silver (Ag) is the element that gets reduced and Zinc (Zn) is the element that gets oxidized

For the second reaction

Nitrogen (N) is the element that gets oxidized and Oxygen (O) is the element that gets reduced

For the third reaction

Iron (Fe) is the element that gets reduced and Aluminum (Al) is the element that gets oxidized

From the question

We are to determine the element that gets reduced and the element that gets oxidized

To do this,

First, we will define the terms oxidizing agent and reducing agent

An oxidizing agent gains electrons and is reduced in a chemical reaction

A reducing agent loses electrons and is oxidized in a chemical reaction

Now,

The oxidation state of Silver (Ag) decreased from +1 to 0. That is, Ag gained 1 electron and is reduced.

∴ Silver (Ag) is the element that gets reduced

Also,

The oxidation state of Zinc (Zn) increased from 0 to +2. That is, Zn lost 2 electrons and is oxidized

∴ Zinc (Zn) is the element that gets oxidized

Here, the oxidation state of Nitrogen (N) increased from -3 to 0. That means N is oxidized

∴ Nitrogen (N) is the element that gets oxidized

The oxidation state of Oxygen (O) decreased from 0 to -2. That means O is reduced

∴ Oxygen (O) is the element that gets reduced

The oxidation state of Iron (Fe) decreased from +3 to 0. That means Fe is reduced

∴ Iron (Fe) is the element that gets reduced

The oxidation state of Aluminum (Al) increased from 0 to +3. That means Al is oxidized

∴ Aluminum (Al) is the element that gets oxidized

Hence,

For the first reaction

Silver (Ag) is the element that gets reduced and Zinc (Zn) is the element that gets oxidized

For the second reaction

Nitrogen (N) is the element that gets oxidized and Oxygen (O) is the element that gets reduced

For the third reaction

Iron (Fe) is the element that gets reduced and Aluminum (Al) is the element that gets oxidized

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Explanation:

Oxidation:

Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.

Reduction:

Reduction involve the gain of electron and oxidation number is decreased.

Oxidizing agents:

Oxidizing agents oxidize the other elements and itself gets reduced.

Reducing agents:

Reducing agents reduced the other element are it self gets oxidized.

Consider the following reaction:

2AgCl + Zn  → 2Ag + ZnCl₂

In this reaction oxidation state of Zn on left side is 0 while on right side +2 so it gets oxidized and oxidation state of Ag on left side is +1 and on right side 0 so it get reduced.

4NH₃  +  3O₂   →   2N₂ +  6H₂O

In this reaction oxidation state of nitrogen on left side is -3 while on right side 0 so it gets oxidized and oxidation state of oxygen on left side is 0 and on right side -2 so it get reduced.

Fe₂O₃ +  2Al  →   Al₂O₃ +  2Fe

In this reaction oxidation state of iron on left side is +3 while on right side 0 so it gets reduced and oxidation state of Al on left side is 0 and on right side +3 so it get oxidized.

first one is the correct answer