QCEVault

Redox and electrochemistry — Question 10

QCAA 2025, Paper 1 · 1 mark

Q10 · 2025 · Paper 1Unclassified1 mark

QUESTION 10

Methane (CH4) reacts with water to produce carbon monoxide (CO) and hydrogen (H2).

CH4(g)+H2O(g)→CO(g)+3H2(g)\mathrm{CH}_{4}(\mathrm{g})+\mathrm{H}_{2}\mathrm{O}(\mathrm{g})\rightarrow\mathrm{CO}(\mathrm{g})+\mathrm{3H}_{2}(\mathrm{g})

Determine the reducing agent.

(A) H in H2

(B) C in CH4

(C) H in CH4

(D) O in H2O

Related questions

  1. Q1 · 2025 QCAA · Paper 1 · 1 mark
    QUESTION 1 Which species is produced at the cathode during the electrolysis of an aqueous copper sulfate (CuSO4) solution using platinum electrodes? (A) Cu(s) (B) H2(g) (C) O2(g) (D) SO2(aq)
    Redox and electrochemistry
  2. Q6 · 2025 QCAA · Paper 1 · 1 mark
    QUESTION 6 Determine which statement is true for an electrolytic cell used for electroplating. (A) The redox reaction is spontaneous. (B) The anode is the object to be plated. (C) The cathode is reduced to replenish the metal ions. (D) The electrolyte contains the metal ions that plate the object.
    Redox and electrochemistry
  3. Q15 · 2025 QCAA · Paper 1 · 1 mark
    QUESTIONS 15–16 Questions 15–16 refer to the galvanic cell shown. Zn(s) | Zn2+(aq) || Ag+(aq) | Ag(s) V Salt bridge Zn Ag QUESTION 15 Calculate the cell potential for the galvanic cell under standard conditions. (A) +0.04 V (B) +0.84 V (C) +1.56 V (D) +2.36 V
    Redox and electrochemistry
  4. Q16 · 2025 QCAA · Paper 1 · 1 mark
    QUESTIONS 15–16 Questions 15–16 refer to the galvanic cell shown. Zn(s) | Zn2+(aq) || Ag+(aq) | Ag(s) V Salt bridge Zn Ag QUESTION 16 Deduce the reaction occurring at the anode for the galvanic cell. (A) Zn2+(aq) + 2e−  Zn(s) (B) Zn(s)  Zn2+(aq) + 2e− (C) Ag(s)  Ag+(aq) + e− (D) Ag+(aq) + e−  Ag(s)
    Redox and electrochemistry