Voltaic Cell

Which direction do the electrons flow in wire X and which metal is oxidized?

• A
• B
• C
• D

Which species is oxidized in the following reaction?

• Ag
• Ag⁺
• Cu
• Cu²⁺

Metal A is more reactive than metal B. Which statement is correct?

• Electrons flow in the external circuit from A to B
• Positive ions flow through salt bridge from A to B
• Positive ions flow in external circuit from B to A.
• Electrons flow through salt bridge from B to A

What is the function of Y in cell below?

• To complete the circuit
• To allow flow of electrons between both cells
• To allow flow of ions 
• To connect both half cells

Reduction happens at the 

• anode
• cathode
• salt bridge
• voltmeter

Oxidation happens at the

• anode
• cathode
• salt bridge
• voltmeter

Reactions in voltaic cells are

• spontaneous, redox reactions
• non-spontaneous, redox reactions
• spontaneous, non-redox reactions
• non-spontaneous, non-redox reactions

This electrode in a voltaic cell gains mass

• anode
• cathode

This electrode loses mass 

• anode
• cathode

In which direction does electricity flow in a voltaic cell (battery)?

• Electrons flow from the cathode to the anode
• Electrons flow from left to right
• Electrons flow from anode to cathode
• Electrons flow from right to left