Zadanie 11
Wzorowane na: Chemistry SL Paper 1, November 2022, pytanie 11. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
Sulfur dioxide, SO2, has sulfur as the central atom. The electronegativity of sulfur is 2.6 and that of oxygen is 3.4. Which row describes the polarity of the bonds and of the molecule correctly?
A. S=O bonds: O is δ − and S is δ +; molecule: polar, with the partial negative charge on the side of the oxygen atoms
B. S=O bonds: O is δ − and S is δ +; molecule: non-polar, because the bond dipoles cancel
C. S=O bonds: S is δ − and O is δ +; molecule: polar, with the partial negative charge on the side of the sulfur atom
D. S=O bonds: O is δ − and S is δ +; molecule: polar, with the partial negative charge on the side of the sulfur atom
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
A ✔
«oxygen is more electronegative than sulfur, so each S=O bond has δ − on oxygen. Sulfur has two bonding domains and one lone pair (three electron domains), so the molecule is bent, the two bond dipoles do not cancel and their resultant points towards the oxygen atoms. The non-polar option assumes a linear molecule»
Schemat punktowania
One mark for the correct option.