Understanding Voltaic and Electrolytic Cells

What is a key feature that distinguishes a voltaic cell from an electrolytic cell?

• Presence of a battery

• Use of zinc plates

• Presence of a galvanometer

• Use of copper plates

In a voltaic cell, why is it important to use different metals for the plates?

• To reduce the cost

• To prevent corrosion

• To ensure a potential difference

• To increase the size of the cell

Which of the following is NOT a suitable electrolyte for a voltaic cell?

• Magnesium sulfate

• Sodium chloride

• Distilled water

• Copper sulfate

How can you determine the negative terminal in a voltaic cell?

• By measuring the temperature

• By checking the color of the metal

• By using a voltmeter

• By referring to the electrochemical series

In the electrochemical series, which metal is typically the negative terminal?

• The one with a neutral position

• The one with a lower position

• The one with a higher position

• The one with a middle position

What happens to magnesium atoms at the anode in a voltaic cell?

• They release electrons

• They form a solid

• They remain unchanged

• They gain electrons

What is the observation at the anode when magnesium is used?

• The magnesium plate becomes thicker

• The magnesium plate becomes thinner

• The magnesium plate changes color

• The magnesium plate remains the same

At the cathode, which ions typically receive electrons in a voltaic cell?

• The ions with the smallest size

• The ions with the largest size

• The ions lower in the electrochemical series

• The ions higher in the electrochemical series

What is a common observation when hydrogen ions receive electrons at the cathode?

• Change in color

• Release of a colorless gas

• Formation of a solid

• Increase in temperature

What test can be used to identify the gas released at the cathode?

• Pop test with a lighted splint

• Flame test

• Litmus test

• Benedict's test