Zadanie 8
Wzorowane na: Chemistry SL Paper 1A, May 2026, TZ3, pytanie 8. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
A mixture of compounds X and Y is separated by thin layer chromatography. The chromatogram is shown.
Which option is consistent with this chromatogram?
A. RF of Y is 0.80; compound Y is more attracted to the mobile phase
B. RF of X is 0.40; compound X is more attracted to the mobile phase
C. RF of Y is 0.80; compound X is more attracted to the mobile phase
D. RF of Y is 1.25; compound Y is more attracted to the mobile phase
Sprawdź rozwiązanieUkryj rozwiązanieKlucz CKE i punktacja
Odpowiedź z klucza
A ✔
«, so RF(Y) ≈ 0.80 and RF(X) ≈ 0.40; the compound that travels further spends more time in the mobile phase, so Y is more attracted to the mobile phase than X»
Schemat punktowania
1 mark for the correct option.
Komentarz
An RF value cannot exceed 1: it is the distance moved by the spot divided by the distance moved by the solvent front.