Question

Select the true statement below.

rusting of metal A may be inhibited by alloying or coating metal A with a less reactive metal B

a hydrogen fuel cell is an electrolytic cell which produces H₂ fuel for combustion

the presence of aqueous H₃O⁺ ions inhibits rust formation

batteries act as galvanic/voltaic cells during discharge, and as electrolytic cells during recharge

the relatively high potential of the lithium-ion battery is due to lithium being a strong oxidizer

Answer 1

1. Rusting of metal A may be inhibited by alloying or coating metal A with a less reactive metal B - Incorrect.

  Rusting of metal A may be inhibited by alloying or coating metal A with a more reactive metal B - Correct.

2. A hydrogen fuel cell is an electrolytic cell which produces H2 fuel for combustion - Incorrect

  A hydrogen fuel cell is an electrochemical cell which uses H2 fuel for combustion - Correct

3. The presence of aqueous H3O+ ions inhibits rust formation - Incorrect

  The presence of aqueous H3O+ ions accelerates rust formation - Correct

4. Batteries act as galvanic/voltaic cells during discharge, and as electrolytic cells during recharge - Correct

During discharge chemical energy is lost and during recharge, electrical energy is converted to chemical energy.

5. The relatively high potential of the lithium-ion battery is due to lithium being a strong oxidizer - Incorrect

The relatively high potential of the lithium-ion battery is due to lithium being a strong reducing agent - Correct