Free Standard Hydrogen Electrode MCQs with Answers
22 Standard Hydrogen Electrode MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
The standard hydrogen electrode provides the reference potential of 0.00 V for measuring electrode potentials. It consists of platinum in contact with hydrogen gas at standard pressure and hydrogen ions at standard concentration, usually at 25°C, and can operate as either the oxidation or reduction half-cell.
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- A. 0.00 volts by convention
- B. 1.00 volt
- C. minus 1.00 volt
- D. 0.76 volts
Explanation: No single electrode potential can be measured in isolation, so the hydrogen electrode is defined as zero and every other potential is…
Correct answer: 0.00 volts by convention- A. a zinc rod in zinc sulphate solution
- B. platinised platinum foil dipping in 1 molar hydrogen ion solution
- C. a copper rod in copper sulphate solution
- D. a carbon rod in pure water
Explanation: Platinum is used because it is chemically inert and does not itself take part in the reaction, while the finely divided platinum black…
Correct answer: platinised platinum foil dipping in 1 molar hydrogen ion solution- A. a strong reducing agent that is easily oxidised
- B. a strong oxidising agent
- C. chemically unreactive
- D. unable to form ions
Explanation: A large negative value means the metal releases electrons readily and prefers to exist as its ion, so it is easily oxidised and therefore…
Correct answer: a strong reducing agent that is easily oxidised- A. 1 molar solution, 298 K and 1 atmosphere pressure
- B. any concentration at 273 K
- C. 0.1 molar solution at 373 K
- D. pure water at room temperature
Explanation: Standard conditions fix the concentration of every solution at 1 molar, the pressure of any gas at 1 atmosphere and the temperature at 298…
Correct answer: 1 molar solution, 298 K and 1 atmosphere pressure- A. H+1 > Cu+2 > Ag+
- B. H+1 > Ag+ > Cu+2
- C. Ag+ > Cu+2 > H+1
- D. H+1 > Cu+2 > Ag+
Explanation: The more positive the standard electrode potential, the more readily the ion accepts electrons, and the values are plus 0.80 V for silver…
Correct answer: Ag+ > Cu+2 > H+1- A. 0.76
- B. -0.76
- C. -0.55
- D. 0.55
Explanation: The standard reduction potential of Zn2+ + 2e- -> Zn is -0.76 V when measured relative to the standard hydrogen electrode.
Correct answer: -0.76- A. to get oxidized
- B. to get reduced
- C. to accept electrons
- D. both B and C
Explanation: A higher standard reduction potential means a greater tendency for a species to gain electrons, so it is more readily reduced and acts as…
Correct answer: both B and C- A. zero
- B. unity
- C. constant
- D. multiple of 1
Explanation: The standard hydrogen electrode is assigned a standard reduction potential of exactly 0 V, and other standard electrode potentials are…
Correct answer: zero- A. New electrode of same element
- B. SHE
- C. 1M solution of ions of respective element
- D. 2M solution of HCI
Explanation: A standard reduction potential is measured by connecting the half-cell to the standard hydrogen electrode, whose potential is defined as 0…
Correct answer: SHE- A. CCu
- B. Ag
- C. Pt
- D. None
Explanation: Platinum is chemically inert and can provide a conducting surface for electron transfer without being consumed in the electrode reaction.
Correct answer: Pt- A. 2M
- B. 1N
- C. 1m
- D. 1M
Explanation: Standard electrode potentials are measured under standard conditions, including a dissolved ionic concentration of 1 M.
Correct answer: 1M- A. 760mm of Hg
- B. 750mm of Hg
- C. 780mm of Hg
- D. 800mm of Hg
Explanation: The standard hydrogen electrode uses hydrogen gas at a standard pressure of 1 atmosphere, which is equal to 760 mm Hg.
Correct answer: 760mm of Hg- A. 1 M ZnO solution
- B. 1 M ZnSO4 solution
- C. 1.5 M ZnSO4 solution
- D. 0.1 M ZnSO4 solution
Explanation: To measure the standard electrode potential of Zn, the Zn2+ activity is taken as 1 M and zinc metal is dipped into a 1 M ZnSO4 solution.
Correct answer: 1 M ZnSO4 solution- A. Oxidation potential
- B. Redox potential
- C. e.m.f of cell
- D. standard reduction potential
Explanation: An oxidising agent accepts electrons, so its tendency to be reduced is measured by its standard reduction potential.
Correct answer: standard reduction potential- A. 10
- B. +1
- C. -1
- D. Zero
Explanation: The potential of the standard hydrogen electrode (SHE) is defined as 0 V under standard conditions.
Correct answer: Zero- A. Emf(oxidation) - Emf(reduction)
- B. Emf(oxidation) + Emf(reduction)
- C. Emf(oxidation) x Emf(reduction)
- D. None of these options are correct
Explanation: This formula is present in the book:Emf of a cell = Oxidation Potential of Anode - Reduction Potential of Cathode.
Correct answer: Emf(oxidation) - Emf(reduction)- A. 2atm
- B. 780 mmHg
- C. 19 Psi
- D. 1 atm
Explanation: To setup a standard half-cell, the conditions are 298.15 Kelvin (temperature), 1 atmosphere (pressure), and have a Molarity of 1.0 M for…
Correct answer: 1 atm- A. Redox Potential
- B. Cell Potential
- C. Oxidation Potential
- D. None of the above
Explanation: Explanation:The emf produced by the Galvanic cell is known as cell potential, which is the difference in reduction potentials of the two…
Correct answer: Cell Potential- A. pH scale
- B. pOH scale
- C. Hydrogen Scale
- D. pKa scale
Explanation: A is incorrect as pH scale is a tool to measure pH(acidity) of a B is incorrect as pOH scale is a tool to measure pOH(alkalinity) of a…
Correct answer: Hydrogen Scale- A. 2H+(aq) + 2e- → H2(g)
- B. H2(g) → 2H+(aq) + 2e-
- C. 2H+(aq) + 2e- → 2H(g)
- D. 2H2- → 2H(g) + 2e-
Explanation: The Standard Hydrogen Electrode (SHE) serves as a benchmark for measuring standard electrode potentials, with a potential of 0 V.
Correct answer: H2(g) → 2H+(aq) + 2e-Standard Hydrogen Electrode MCQs: common questions
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