Oxidation and Reduction (LC 2027) (Leaving Cert Chemistry): Quizzes

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What is oxidation in terms of electron transfer?

Loss of electrons

What is reduction in terms of electron transfer?

Gain of electrons

In the OIL RIG mnemonic, what does 'RIG' stand for?

Reduction Is Gain

When oxidation occurs in a reaction, what else must happen simultaneously?

Reduction

In the reaction 2Mg+O2→2Mg2+O2−2Mg + O_2 \rightarrow 2Mg^{2+}O^{2-}, what happens to magnesium?

Loses two electrons

In Zn+Cu2+→Zn2++CuZn + Cu^{2+} \rightarrow Zn^{2+} + Cu, what happens to zinc?

It is oxidised

In 2I−+Cl2→2Cl−+I22I^- + Cl_2 \rightarrow 2Cl^- + I_2, which species is reduced?

Cl2Cl_2

What does an oxidising agent do during a redox reaction?

Accepts electrons

What does a reducing agent do during a redox reaction?

Donates electrons

In Zn+Cu2+→Zn2++CuZn + Cu^{2+} \rightarrow Zn^{2+} + Cu, what is the oxidising agent?

Cu2+Cu^{2+}

In 2I−+Cl2→2Cl−+I22I^- + Cl_2 \rightarrow 2Cl^- + I_2, what is the reducing agent?

I−I^-

Which oxidising agent is used to purify drinking water?

Chlorine gas

How does vitamin C help the body absorb iron?

Converts Fe3+Fe^{3+} to Fe2+Fe^{2+}

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