Zadanie 12
Wzorowane na: Chemistry SL Paper 1, May 2024, TZ2, pytanie 12. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
Which pair of liquids is immiscible?
A. CH3OH and CH3CH2CH2OH
B. CH3COCH3 and H2O
C. C6H14 and CCl4
D. C6H12 and H2O
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
D ✔
«cyclohexane is non-polar and has only London (dispersion) forces between its molecules, whereas water has strong hydrogen bonds; the forces that would form between cyclohexane and water are much weaker than those lost between water molecules, so the liquids do not mix»
«the other pairs can mix: two alcohols (hydrogen bonding), propanone and water (hydrogen bonds from water to the carbonyl oxygen), and two non-polar liquids (London forces only)»
Schemat punktowania
One mark for the correct option.