Redox Reaction

Reducing agents are ____1____ in a reaction.

Reducing agents cause the other substance in the reaction to ____2____ oxygen.

Which words complete gaps 1 and 2?

Magnesium reacts with copper oxide. The equation for this reaction is shown.

Mg+CuO→MgO+Cu

Which substance is acting as an oxidising agent in this reaction?

Iron is extracted from its oxide using carbon monoxide. The equation is shown.

Fe₂O₃+3CO→2Fe+3CO₂

Which row identifies the reducing agent and explains how it acts as a reducing agent?

Iron can be obtained from iron(III) oxide by heating with aluminium powder. The equation is shown.

2Al+Fe₂O₃→Al₂O₃+2Fe

What is the oxidising agent?

The equation for the reaction of zinc oxide with carbon monoxide is shown.

ZnO+CO→Zn+CO₂

Which statement explains the role of carbon monoxide in this reaction?

Iron oxide reacts with aluminium.

Fe₂O₃+2Al→2Fe+Al₂O₃

Which row identifies the oxidising agent and reducing agent in the reaction?

2 NH₃ + 3CuO → N₂ + 3Cu + 3H₂O

The equation above represents the reaction between ammonia and copper(II) oxide. Which of the following is true about the reaction?

Which of the following equation shows that a chlorine molecule receives 2 electrons to form 2 chloride ions?

Which of the following equation shows that a copper(II) ion receive 2 electrons to form
copper atom?

Which of the following equation shows that a zinc atom donates 2 electrons to form a zinc ion?

The following equation represents the oxidation of magnesium atom.

Mg → Mg²⁺ + 2e-

What is meant by oxidation based on the equation?

Which of the following is a reduction reaction?

Which half equations show that reactant acts as a reducing agent?

I. \(\mathrm{Mg} \longrightarrow \mathrm{Mg}^{2+}+2 \mathrm{e}^{-}\)
II. \(\mathrm{Cu}^{2+}+2 \mathrm{e}^{-} \longrightarrow \mathrm{Cu}\)
III. \(2 \mathrm{Cl}^{-} \longrightarrow \mathrm{Cl}_2+2 \mathrm{e}^{-}\)
IV. \(2 \mathrm{H}^{+}+2 \mathrm{e}^{-} \longrightarrow \mathrm{H}_2\)

The reaction between iron(II) sulphate solution and bromine can be represented by the
following equation.

Fe²⁺ + Cl₂ → Fe³⁺ + 2Cl⁻

Which of the following is true about the reaction?

Which of the followings are reducing process?

Which set of definition of oxidation in terms of oxygen, hydrogen and electron is correct?

\[
\begin{array}{|l|l|l|l|}
\hline & \text { Oxygen } & \text { Hydrogen } & \text { Electrons } \\
\hline \text { A } & \text { Gain } & \text { Loss } & \text { Loss } \\
\hline \text { B } & \text { Gain } & \text { Loss } & \text { Gain } \\
\hline \text { C } & \text { Loss } & \text { Gain } & \text { Gain } \\
\hline \text { D } & \text { Loss } & \text { Gain } & \text { Loss } \\
\hline
\end{array}
\]

Find the oxidation number of sulphur in Na₂S₂O3.

What is the oxidation number of sulphur in K₂SO₃?

What is the oxidation number of vanadium in V₂O₅?

What is the oxidation state of nitrogen in a nitric acid molecule?

What is the oxidation state of phosphorus in a phosphoric acid molecule?

What is the oxidation number of hydrogen in magnesium hydride, \(\mathrm{MgH}_2\) ?

Which of the underlined element in the following compounds has the highest oxidation number?

Which of the following is true about the oxidation number of the elements in NH₄ClO₃.

What is the oxidation number of \(\mathrm{X}\) in \(\mathrm{XO}_4^{-}\)?

What is the oxidation number of the chromium element in potassium dichromate(VI), \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\) ?