Electrochemistry

Class 11 · Chemistry · 5 questions

Name: ____________________ Date: ____________

In a galvanic cell, oxidation takes place at the:
- A Salt bridge
- B Voltmeter
- C Cathode
- D Anode
The standard hydrogen electrode has a potential of:
- A 0 V
- B 1 V
- C -1 V
- D 0.76 V
The role of the salt bridge is to:
- A Complete the circuit by allowing ions to move
- B Cool the cell
- C Supply electrons
- D Produce hydrogen
E cell is calculated as:
- A E cathode + E anode
- B E anode - E cathode
- C E cathode - E anode
- D E cathode x E anode
Which will rust faster: iron with a zinc coating that is scratched, or iron with a tin coating that is scratched?
- A Zinc coated
- B Tin coated
- C Both equally
- D Neither

Answer key

1. D, 2. A, 3. A, 4. C, 5. B

Oxidation occurs at the anode in all cells.
It is defined as 0.00 V.
It lets ions flow and keeps the half cells neutral.
Use standard reduction potentials: E cell = E cathode - E anode.
Zinc is more reactive and protects the iron. Tin is less reactive, so exposed iron corrodes.