MCQs

1. The standard electrode potential of the Standard Hydrogen Electrode is:
A) +1.0 V
B) −1.0 V
C) 0.00 V
D) 0.5 V

. The electrode used in the Standard Hydrogen Electrode is:
2 A) Copper
B) Zinc
C) Platinum
D) Iron

3. The pressure of hydrogen gas in SHE under standard conditions is:
A) 2 atm

B) 1 atm
C) 0.5 atm
D) 10 atm

4. The concentration of H⁺ ions in SHE is:
A) 0.1 M
B) 1 M
C) 2 M
D) 10 M

5. The temperature at which SHE is defined is
: A) 273 K
B) 298 K
C) 310 K
D) 350 K

6. The main function of the Standard Hydrogen Electrode is to:
A) Produce hydrogen gas
B) Measure resistance
C) Act as a reference electrode
D) Store energy

7. Why is platinum used in SHE?
A) It reacts with hydrogen
B) It is cheap
C) It is inert and conducts electricity
D) It absorbs water

8. The reaction occurring at SHE is:
A) H⁺ → H₂ + e⁻
B) H₂ → 2H⁺ + 2e⁻
C) H₂ + 2e⁻ → 2H⁺
D) H⁺ + e⁻ → H₂

9. SHE can act as:
A) Only anode
B) Only cathode
C) Both anode and cathode
D) Neither

10. If the concentration of H⁺ ions is increased, the electrode potential of SHE:
A) Increases
B) Decreases
C) Remains zero
D) Becomes negative

11. The potential of SHE is taken as zero because:
A) It has no potential
B) It is easy to measure
C) It is chosen as reference by convention
D) Hydrogen has zero energy

12. Which of the following is NOT a condition for SHE?
A) 1 atm pressure
B) 1 M H⁺ concentration
C) 298 K temperature
D) Use of copper electrode