A. Cu
B. Ag
C. Pt
D. None
✅ The correct answer is option C.
Electrochemistry MCQs
2. If electricity is passed through a CuSO4 solution by using a Pt electrode then which of the following possible change occurs?
A. H2 is deposited at the cathode
B. Colour of the solution becomes fade
C. Cu is deposited at an anode
D. All are possible
✅ The correct answer is option B.
3. Stronger the oxidizing agent greater is the
A. Oxidation potential
B. Reduction potential
C. Redox potential
D. Emf of the cell
✅ The correct answer is option B.
4. Which has a maximum oxidation number?
A. N
B. Cr
C. S
D. Mn
✅ The correct answer is option D.
5. Which of the following cell is not rechargeable?
A. Lead storage battery
B. Silver oxide cell
C. Fuel cell
D. Ni-Cd cell
✅ The correct answer is option B.
6. In an electrolytic cell current flows?
A. From cathode to anode in the outer circuit
B. From anode to cathode outside the cell
C. From cathode to anode inside the cell
D. Both B & C
✅ The correct answer is option B.
7. Which of the following is true in the case of the Zn-Cu cell?
A. The flow of electrons takes place from copper to zinc
B. E0red of the copper electrode is less than that of a zinc electrode
C. Zinc acts as an anode and copper as a cathode
D. All are correct
✅ The correct answer is option C.
8. In a galvanic cell
A. Chemical energy is converted into electricity
B. Chemical energy is converted into heat
C. Electrical energy is converted into chemical energy
D. Electrical energy is converted into heat
✅ The correct answer is option A.
9. The degree of dissociation of week electrolyte increases as
A. Pressure Increases
B. Dilution decreases
C. Dilution increases
D. None
✅ The correct answer is option C.
10. Molten NaCl conducts electricity due to the presence of
A. Free Electrons
B. Free molecules
C. Free ions
D. Atoms of Na and Cl
✅ The correct answer is option C.