Electrochemical Cell Multiple Choice Questions and Answers

1. +4
2. +5
3. +6
4. +8

Answer: +6

1. Oxidation occurs at the cathode
2. Electrons move into the cathode
3. Usually denoted by a negative sign
4. Is usually made up of insulating material

Answer: Electrons move into the cathode

1. Salt bridge joins the two halves of an electrochemical cell
2. It completes the inner circuit
3. It is filled with a salt solution (or gel)
4. It does not maintain electrical neutrality of the electrolytic solutions of the half-cells

Answer: It does not maintain electrical neutrality of the electrolytic solutions of the half-cells

1. The electrochemical cell behaves like an electrolytic cell
2. The electrochemical cell stops functioning
3. Only oxidation reactions occur in the cell
4. Only reduction reactions occur in the cell

Answer: The electrochemical cell behaves like an electrolytic cell

1. Increase in temperature
2. The difference of cell potentials of both electrodes become zero.
3. By reversing the direction of reaction taking place in the cell.
4. Due to change in concentration

Answer: The difference of cell potentials of both electrodes become zero.

1. Nickel is oxidised
2. Silver is oxidised
3. Nickel is reduced
4. Silver is precipitated

Answer: Nickel is oxidised

1. Voltmeter
2. Wheatstone bridge
3. Galvanometer
4. Ammeter

Answer: Wheatstone bridge

1. potential of both electrodes becomes zero.
2. potential of both electrodes becomes equal.
3. one of the electrode is completely corroded.
4. reaction will occur in opposite direction.

Answer: one of the electrode is completely corroded.

1. 1 Joule
2. 1 volt
3. 1 Faraday
4. 1 coulomb

Answer: 1 Faraday

1. by the movement of ions
2. by the movement of atoms
3. by the movement of molecules
4. by the movement of electrons from the cathode to anode

Answer: by the movement of electrons from the cathode to anode

1. Either movement of electrons or ions
2. The flow of free mobile electrons
3. Movement of ions
4. None of the above

Answer: Movement of ions

1. 100 lit
2. < 1
3. = 0
4. Not defined

Answer: = 0

1. Cell potential is an extensive property
2. Cell potential is an intensive property
3. The Gibbs free energy of an electrochemical cell is an intensive property
4. Gibbs free energy is undefined for an electrochemical cell

Answer: Cell potential is an intensive property

1. Voltaic cell
2. Photovoltaic cell
3. Electrolytic cell
4. Fuel Cell

Answer: Photovoltaic cell

1. Primary cells cannot be recharged
2. They have low internal resistance
3. They have an irreversible chemical reaction
4. Their initial cost is cheap

Answer: They have low internal resistance

1. Storage cell
2. Electrolytic cell
3. Fuel cell
4. Leclanche cell

Answer: Electrolytic cell

1. Z > Y > X
2. Z > X > Y
3. X > Y > Z
4. Y > Z > X

Answer: Z > X > Y

1. Daniel cell
2. Voltaic cell
3. Galvanic cell
4. Electrolytic cell

Answer: Electrolytic cell

1. H2S
2. H2SO3
3. SnCl2
4. HNO2

Answer: H2S

1. Changes with a change of concentration of electrolyte
2. Remains constant for a cell
3. changes with a change of electrolyte
4. changes with change in temperature

Answer: Remains constant for a cell

1. The jelly acts as an electrolyte
2. It helps the electrolytes to mix with the contents of the half cells
3. It helps maintain the electrical polarity between the two half-cell solutions
4. It keeps the electrolyte in semi-solid phase and prevents it from mixing with the two half-cell solutions

Answer: It keeps the electrolyte in semi-solid phase and prevents it from mixing with the two half-cell solutions

1. Nickel-cadmium cell
2. Lead storage cell
3. Mercury cell
4. Leclanche cell

Answer: Leclanche cell

1. Oxidation
2. Reduction
3. Redox
4. All the given

Answer: All the given

1. in inverse proportion to its length
2. in direct proportion to its length
3. in the inverse proportion of the square of its area of cross section
4. in direct proportion of the area of its cross section

Answer: in direct proportion to its length

1. 1 : 1 : 1
2. 1 : 2 : 3
3. 2 : 1 : 3
4. 3 : 6 : 2

Answer: 3 : 6 : 2

1. Anode to cathode externally
2. Anode to cathode internally
3. Cathode to anode externally
4. Cathode to anode in the solution

Answer: Anode to cathode externally

1. Galvanometer
2. Ammeter
3. Voltmeter
4. Potentiometer

Answer: Potentiometer

1. Iron
2. Zinc
3. Both
4. Neither of the metals

Answer: Zinc

1. ΔG = 0
2. ΔG < 0
   
3. ΔG > 0
4. ΔG ≥ 1

Answer: ΔG < 0

1. KMnO4
2. K2Cr2O7
3. HNO3
4. H2O2

Answer: H2O2