Zadanie 17
Wzorowane na: Chemistry SL Paper 1A, May 2026, TZ3, pytanie 17. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
Which option describes the electrode reactions in a hydrogen fuel cell with an acidic electrolyte?
2 H2(g) + O2(g) → 2 H2O(l)
A. Cathode: hydrogen is oxidized; anode: oxygen is reduced
B. Cathode: oxygen is reduced; anode: hydrogen is oxidized
C. Cathode: oxygen loses electrons; anode: hydrogen gains electrons
D. Cathode: oxygen is reduced; anode: hydrogen gains electrons
Sprawdź rozwiązanieUkryj rozwiązanieKlucz CKE i punktacja
Odpowiedź z klucza
B ✔
«at the cathode oxygen is reduced (gains electrons) and at the anode hydrogen is oxidized (loses electrons)»
Schemat punktowania
1 mark for the correct option.
Komentarz
Reduction always occurs at the cathode and oxidation at the anode, also in a fuel cell.