Electrochemistry Quizzes for University Students: Master Electrochemistry Concepts

Question 1

Which of the following reactions is classified as a redox reaction?

Accepted Answer

Fe + CuSO₄ → FeSO₄ + Cu

Answer

2Na + Cl₂ → 2NaCl

Answer

NaOH + HCl → NaCl + H₂O

Answer

CH₄ + 2O₂ → CO₂ + 2H₂O

Question 2

What is the name of the constant representing the amount of electricity required to reduce 1 mole of a substance?

Accepted Answer

Faraday's constant

Answer

Molar conductivity

Answer

Equivalent weight

Answer

Electrochemical equivalent

Question 3

Which of the following substances is categorized as a strong electrolyte?

Accepted Answer

Sodium chloride

Answer

Sugar

Answer

Methanol

Answer

Carbon dioxide

Question 4

During the electrolysis of water, what is the product formed at the cathode?

Accepted Answer

Hydrogen

Answer

Oxygen

Answer

Sodium hydroxide

Answer

Chlorine

Question 5

What is the definition of the electromotive force (emf) of an electrochemical cell?

Accepted Answer

Electrical potential difference between the electrodes

Answer

Concentration of reactants

Answer

Temperature

Answer

Rate of the reaction

Question 6

In an electrochemical cell, the electrode where oxidation occurs is termed as the:

Accepted Answer

Anode

Answer

Cathode

Answer

Salt bridge

Answer

Electrolyte

Question 7

The overall chemical reaction occurring in an electrochemical cell can be categorized as a:

Accepted Answer

Redox reaction

Answer

Neutralization reaction

Answer

Precipitation reaction

Answer

Combustion reaction

Question 8

The standard reduction potential of a half-reaction quantifies the:

Accepted Answer

Likelihood of a substance undergoing reduction

Answer

Likelihood of a substance undergoing oxidation

Answer

Total cell potential

Answer

Current flow in the cell

Question 9

The process of utilizing electrical energy to drive a chemical reaction that would otherwise not occur spontaneously is called:

Accepted Answer

Electrolysis

Answer

Galvanization

Answer

Electroplating

Answer

Corrosion

Question 10

In the electrolysis of molten NaCl, the substance formed at the cathode is:

Accepted Answer

Sodium metal

Answer

Chlorine gas

Answer

Hydrogen gas

Answer

Sodium chloride

Question 11

Which of the following factors does NOT influence the rate of an electrochemical reaction?

Accepted Answer

Magnetic field

Answer

Concentration of reactants

Answer

Temperature

Answer

Surface area of electrodes

Question 12

A fuel cell is an electrochemical device that primarily serves to:

Accepted Answer

Convert chemical energy into electrical energy

Answer

Convert electrical energy into chemical energy

Answer

Store electrical energy

Answer

Generate heat

Question 13

Which of the following is NOT a practical application of electrochemistry?

Accepted Answer

Nuclear power generation

Answer

Electroplating

Answer

Electrosynthesis

Answer

Corrosion prevention

Question 14

Which of the following is not a type of electrochemical cell?

Accepted Answer

Hydroelectric cell

Answer

Galvanic cell

Answer

Electrolytic cell

Answer

Daniell cell

Question 15

What is the standard reduction potential of the hydrogen electrode?

Accepted Answer

0 V

Answer

1 V

Answer

-1 V

Answer

0.7 V

Question 16

What is the primary function of a salt bridge in an electrochemical cell?

Accepted Answer

Maintain electrical neutrality in the cell

Answer

Allow electron flow between half-cells

Answer

Prevent reactant mixing

Answer

Provide a proton source

Question 17

What is the main product of water electrolysis?

Accepted Answer

Hydrogen and oxygen

Answer

Hydrogen and chlorine

Answer

Oxygen and chlorine

Answer

Hydrogen and bromine

Question 18

What does the Faraday constant represent?

Accepted Answer

Charge carried by one mole of electrons

Answer

Potential difference between anode and cathode

Answer

Electron flow rate in an electrochemical cell

Answer

Number of moles of ions produced in an electrochemical cell

Question 19

Which of the following is not an application of electrochemistry?

Accepted Answer

Nuclear reactions

Answer

Batteries

Answer

Fuel cells

Answer

Electroplating

Question 20

Differentiate between an anode and a cathode.

Accepted Answer

Anode is where oxidation occurs, cathode is where reduction occurs

Answer

Anode is positive, cathode is negative

Answer

Anode is negative, cathode is positive

Answer

Anode is where reduction occurs, cathode is where oxidation occurs

Question 21

In a voltaic cell, electrons flow from which electrode to which electrode?

Accepted Answer

From the anode to the cathode

Answer

In both directions, depending on the cell potential.

Answer

From the cathode to the anode

Question 22

What is the primary function of a salt bridge in an electrochemical cell?

Accepted Answer

To maintain electrical neutrality in the half-cells

Answer

To increase the cell potential

Answer

To provide a pathway for electron flow

Question 23

During electrolysis, reduction occurs at the:

Accepted Answer

Cathode

Answer

Anode

Answer

Electrolyte

Answer

Salt bridge

Question 24

Which of the following is NOT a type of electrochemical cell?

Accepted Answer

Thermocouple

Answer

Voltaic cell

Answer

Concentration cell

Answer

Electrolytic cell

Question 25

The Nernst equation is used to calculate the:

Accepted Answer

Cell potential under non-standard conditions

Answer

Equilibrium constant for a reaction

Answer

Rate of an electrochemical reaction

Answer

Standard cell potential

Question 26

The Faraday constant represents:

Accepted Answer

The charge carried by one mole of electrons

Answer

The standard cell potential

Answer

The rate of an electrochemical reaction

Answer

The equilibrium constant for a reaction