Zadanie 17
Wzorowane na: Chemistry SL Paper 1A, November 2025, 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 statement describes a disadvantage of using bioethanol rather than petrol (gasoline) as a fuel for cars?
A. The carbon dioxide released when bioethanol burns was recently removed from the atmosphere by the crop
B. Bioethanol releases less energy per kilogram than petrol
C. The raw materials for bioethanol can be regrown every year
D. Bioethanol can be made by the fermentation of sugars
Sprawdź rozwiązanieUkryj rozwiązanieKlucz CKE i punktacja
Odpowiedź z klucza
B ✔
«ethanol molecules already contain oxygen, so less energy is released per kilogram (lower specific energy) than from the hydrocarbons in petrol and more fuel must be carried for the same journey; the other statements are advantages of biofuels (carbon neutrality, renewability) or a neutral fact about their production»
Schemat punktowania
One mark for the correct option.