Question 1

Which of the following best describes the function of the salt bridge in a galvanic cell?

Accepted Answer

It maintains electrical neutrality by allowing ions to move between the half-cells.

Question 2

In a zinc-copper galvanic cell, which statement correctly identifies the anode and cathode?

Accepted Answer

Zinc is the anode and copper is the cathode.

Question 3

What is the direction of electron flow in a galvanic cell?

Accepted Answer

From the anode to the cathode.

Question 4

Which equation correctly represents the oxidation half-reaction occurring at the zinc electrode in a zinc-copper galvanic cell?

Accepted Answer

$$\mathrm{Zn \rightarrow Zn$$^{2+}$$ + 2e^-}$$

Question 5

A student sets up a galvanic cell with copper and silver electrodes. Which process occurs at the silver electrode?

Accepted Answer

Silver ions are reduced to silver atoms.

Question 6

If the potential difference between two half-cells is negative, what will happen?

Accepted Answer

No spontaneous reaction will occur and no current will be generated.

Question 7

Which of the following best explains why a strip of copper placed in a solution of zinc sulfate does not react?

Accepted Answer

Copper cannot reduce zinc ions because copper has a lower reduction potential than zinc.

Question 8

In a galvanic cell, what is the role of the wire connecting the two electrodes?

Accepted Answer

It provides a pathway for electrons to flow from the anode to the cathode.

Question 9

Which statement about the charge distribution in a galvanic cell is correct?

Accepted Answer

The anode becomes negatively charged and the cathode becomes positively charged.

Question 10

In a silver-copper galvanic cell, which ions move through the salt bridge and in which direction?

Accepted Answer

Anions move from the cathode to the anode; cations move from the anode to the cathode.

Question 11

A battery is based on the principles of a galvanic cell. Which statement best describes how it generates electrical energy?

Accepted Answer

By separating oxidation and reduction reactions and allowing electrons to flow through an external circuit.

Question 12

Which of the following is the correct unit for potential difference in a galvanic cell?

Accepted Answer

Volt (V)

Question 13

Consider a galvanic cell with a potential difference of $$1.10\ \mathrm{V}. If $$the cell delivers a charge of $$2.00\ \mathrm{C}$$, how much energy is produced?

Accepted Answer

$$2.20\ \mathrm{J}$$

Question 14

Which of the following reactions will NOT occur spontaneously in a galvanic cell?

Accepted Answer

Copper metal placed in zinc sulfate solution.

Question 15

In a galvanic cell, which statement about the anode is correct?

Accepted Answer

The anode is where oxidation occurs.

Question 16

A coil of copper is placed in a solution of silver ions. What is the overall cell reaction?

Accepted Answer

$$\mathrm{Cu + 2Ag^+ \rightarrow Cu$$^{2+}$$ + 2Ag}$$

Question 17

Which of the following best describes the movement of electrons and ions in a functioning galvanic cell?

Accepted Answer

Electrons move from the anode to the cathode through the wire; cations move from the anode to the cathode through the salt bridge.

Question 18

Which of the following is a necessary condition for a galvanic cell to produce an electric current?

Accepted Answer

The potential difference between the two half-cells must be positive.

Question 19

In a real-world scenario, why is it important for the salt bridge in a battery to remain intact?

Accepted Answer

It ensures continuous ion flow to maintain electrical neutrality and allow the battery to function.

Question 20

Which of the following best explains why batteries stop working when the reactants are depleted?

Accepted Answer

The potential difference becomes zero, so no electrons flow.

Galvanic Cells and the Principles of Electrochemistry

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