Redox Reactions and Metals Quiz

What is oxidation in terms of electron transfer?

• Sharing of electrons

• No change in electrons

• Loss of electrons

• Gain of electrons

Which of the following is an example of a reduction reaction?

• NaCl(s) -> Na+(aq) + Cl-(aq)

• H2O(l) -> H2(g) + O2(g)

• Cu2+(aq) + 2e- -> Cu(s)

• Mg(s) + O2(g) -> MgO(s)

In a redox reaction, what happens to the species that is reduced?

• It loses electrons

• It gains protons

• It gains electrons

• It loses protons

Which of the following reactions is a redox reaction?

• CaCO3(s) -> CaO(s) + CO2(g)

• NaCl(s) -> Na+(aq) + Cl-(aq)

• H2O(l) -> H2(g) + O2(g)

• Mg(s) + Cu2+(aq) -> Mg2+(aq) + Cu(s)

What is the role of magnesium in the reaction with copper sulfate solution?

• It acts as a catalyst

• It is oxidized

• It is reduced

• It remains unchanged

What is the product when magnesium is oxidized?

• Mg(s)

• MgO(s)

• Mg2+(aq)

• MgCl2(aq)

Which of the following is true about displacement reactions?

• They involve only oxidation

• They involve both oxidation and reduction

• They involve only reduction

• They are not redox reactions

What is the mnemonic to remember oxidation and reduction?

• RED CAT

• OIL RIG

• LEO the lion says GER

• AN OX

What happens to copper ions in the reaction with magnesium?

• They are oxidized

• They are reduced

• They form a gas

• They remain as ions

Which of the following is an example of a metal being oxidized?

• Mg(s) -> Mg2+(aq) + 2e-

• Cu2+(aq) + 2e- -> Cu(s)

• H2(g) -> 2H+(aq) + 2e-

• O2(g) + 4e- -> 2O2-(aq)