Zadanie 1
Wzorowane na: Chemistry SL Paper 1, May 2024, TZ1, pytanie 1. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
Which statements about pure carbon dioxide, CO2, are correct?
I. It can be separated into carbon and oxygen by filtration.
II. Its carbon and oxygen atoms are present in the same fixed ratio in every sample.
III. Its atoms of the two elements are chemically bonded together.
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
C ✔
«carbon dioxide is a compound: atoms of different elements are chemically bonded together in a fixed ratio (1 C : 2 O) in every sample, so II and III are true; a compound cannot be broken down by a physical method such as filtration (that is how a mixture is separated), so I is false»
Schemat punktowania
One mark for the correct option.