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ELECTROCHEMISTRY MCQs

Total Questions : 21 | Page 2 of 3 pages
Question 11. What would be the theoretical cell potential of the previous electrochemical cell?Ag+/Ag = 0
  1.    1.05V
  2.    -1.05V
  3.    0.55V
  4.    -0.55V
 Discuss Question
Answer: Option A. -> 1.05V
Question 12. What is a redox reaction?
  1.    A reaction where both reactants get reduced.
  2.    A reaction where both reactants get oxidized.
  3.    A reaction that involves a transfer of electrons between reactants.
  4.    A reaction that involves the combustion of at least one reactant.
 Discuss Question
Answer: Option C. -> A reaction that involves a transfer of electrons between reactants.
Question 13. In electrochemistry __________________are usually linked to electronic devices that measure the electrical parameters of the reactants in solution
  1.    salt bridge
  2.    wires
  3.    membranes
  4.    electrodes
 Discuss Question
Answer: Option D. -> electrodes
Question 14. Is it possible for a cell potential to have NEGATIVE sign?
  1.    NO
  2.    YES
 Discuss Question
Answer: Option A. -> NO
Question 15. What is an oxidizing agent?
  1.    It is the species that gets reduced -- gains electrons.
  2.    It is the species that gets oxidized -- loses electrons.
  3.    It is the species that creates electrons.
  4.    It is the species that loses electrons.
 Discuss Question
Answer: Option A. -> It is the species that gets reduced -- gains electrons.
Question 16. What is a standard half-cell?
  1.    It is one cell that comprises half of a whole battery.
  2.    It is a cell containing only a metal bar with no aqueous ion solution.
  3.    It is a cell containing only an aqueous ion solution and no metal bar.
  4.    It is a cell that generates half of a volt of electricity.
 Discuss Question
Answer: Option A. -> It is one cell that comprises half of a whole battery.
Question 17. WHAT DOES THE SALT BRIDGE/POROUS POT USED FOR?
  1.    TO COMPLETE THE CIRCUIT
  2.    ALLOW MOVEMENT OF IONS
  3.    ALLOW FLOW OF CHARGE
  4.    Both A & B
 Discuss Question
Answer: Option D. -> Both A & B
Question 18. Which energy conversion shown below takes place in an electrochemical cell?
  1.    Electrical to chemical
  2.    Mechanical to chemical
  3.    Mechanical to electrical
  4.    Chemical to electrical
 Discuss Question
Answer: Option D. -> Chemical to electrical
Question 19. According to Bronsted law, water is a/an
  1.    acid
  2.    base
  3.    both acid and base
  4.    none of the above
 Discuss Question
Answer: Option C. -> both acid and base
Question 20. When aqueous ammonia is added to CuSO4 solution, the solution turns deep blue
  1.    NH3 replaces H2O
  2.    H2O replaces NH3
  3.    NH3 remains
  4.    H2O remains
 Discuss Question
Answer: Option B. -> H2O replaces NH3

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