Zadanie 21
Wzorowane na: Chemistry SL Paper 1A, November 2025, TZ3, pytanie 21. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
Which of the following correctly describes the effect of a catalyst on a reaction?
A. It increases the frequency of collisions between reactant particles
B. It increases the proportion of collisions with energy greater than or equal to the activation energy
C. It lowers the enthalpy change of the reaction
D. It increases the rate of the forward reaction but not the rate of the reverse reaction
Sprawdź rozwiązanieUkryj rozwiązanieKlucz CKE i punktacja
Odpowiedź z klucza
B ✔
«a catalyst provides an alternative pathway with a lower activation energy, so a larger fraction of the existing collisions are successful; it does not change the kinetic energy of the particles, the collision frequency or ΔH, and it speeds up the forward and reverse reactions equally»
Schemat punktowania
One mark for the correct option.