Redox Processes

. Iron is a stronger reducing agent than silver. What is correct when this voltaic cell is in operation?

• A

• B

• C

• D

What is correct in an electrolytic cell?

• A

• B

• C

• D

What are the oxidation states of oxygen?

• A

• B

• C

• D

State the oxidation state of manganese in MnO2 and MnCl2.

Deduce, referring to oxidation states, whether MnO2 is an oxidizing or reducing agent.

The diagram shows an unlabelled voltaic cell for the reaction

Suggest a metal that could replace nickel in a new half-cell and reverse the electron flow. Use section 25 of the data booklet

In which species does sulfur have the same oxidation state as in SO3 ²⁻ ?

• A

• B

• C

• D

The following occurs when metal X is added to Y sulfate solution and Z sulfate solution. (X, Y and Z represent metal elements but not their symbols.)

• A

• B

• C

• D