36. Which of the following is a characteristic of a cathode?
a) It is the site of reduction reaction
b) It is the site of oxidation reaction
c) It is the site of electrolyte solution
d) It is the site of salt bridge
37. What is the purpose of a separator in an electrochemical cell?
a) To complete the circuit
b) To prevent mixing of electrolytes
c) To increase the voltage
d) To control the flow of electrons
38. Which of the following is a characteristic of a concentration cell?
a) It operates at very low temperatures
b) It has a positive cell potential
c) It has a negative cell potential
d) It uses the same electrolyte with different concentrations
39. What is the purpose of an ion-selective membrane in an electrochemical cell?
a) To complete the circuit
b) To prevent mixing of electrolytes
c) To increase the voltage
d) To control the flow of ions
40. What is the purpose of a reference electrode in an electrochemical cell?
a) To complete the circuit
b) To prevent mixing of electrolytes
c) To measure the potential difference
d) To control the flow of electrons
