برقی کیمیا

In a galvanic cell, oxidation takes place at the:

• 1 Salt bridge
• 2 Voltmeter
• 3 Cathode
• 4 Anode

The standard hydrogen electrode has a potential of:

• 1 0 V
• 2 1 V
• 3 -1 V
• 4 0.76 V

The role of the salt bridge is to:

• 1 Complete the circuit by allowing ions to move
• 2 Cool the cell
• 3 Supply electrons
• 4 Produce hydrogen

E cell is calculated as:

• 1 E cathode + E anode
• 2 E anode - E cathode
• 3 E cathode - E anode
• 4 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?

• 1 Zinc coated
• 2 Tin coated
• 3 Both equally
• 4 Neither