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

• A
• B
• C
• D

Tags

NGSS.HS-PS3-5

Which statement is correct when the cell produces electricity?

• Magnesium atoms lose electrons
• Mass of the iron electrode decreases.
• Electrons flow from the iron half-cell to the magnesium half-cell.
• Negative ion flow from magnesium half-cell to iron half-cell

Tags

NGSS.HS-PS1-2

Which species is oxidized in the following reaction?

• Ag
• Ag⁺
• Cu
• Cu²⁺

Tags

NGSS.HS-PS1-2

Which species is oxidizing agent and which is reducing agent?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

Tags

NGSS.HS-PS1-2

Which changes could take place at positive electrode in a voltaic cell?

• I and II
• I and III
• II and III
• I, II and III

What is the role of zinc in the cell?

• positive electrode and the oxidizing agent
• positive electrode and the reducing agent
• negative electrode and the oxidizing agent
• negative electrode and the reducing agent

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

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

What occurs during the operation of a voltaic cell?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-2

Below shows a cell diagram for voltaic cell. Which of the following is FALSE?

• Electrons flow from anode to cathode
• Oxidation happens in anode
• Copper undergo reduction to form copper ions
• Zinc undergo oxidation to form Zinc ions

Tags

NGSS.HS-PS1-7

NGSS.HS-PS2-5