Zadanie 14
Wzorowane na: Chemistry HL Paper 1, November 2024, pytanie 14. 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 alloys are correct?
I. Alloys can contain non-metallic elements as well as metals.
II. Alloys are usually softer than the pure metals they contain, because their layers slide over each other more easily.
III. Atoms of different sizes disrupt the regular arrangement of the lattice, so it is harder for the layers to slide.
A. I and III only
B. II and III only
C. I and II only
D. I, II and III
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
A ✔
«I is true (for example steel contains carbon); II is false, because alloys are usually harder and stronger than the pure metals; III is true, since atoms of different sizes distort the layers and hinder sliding»
Schemat punktowania
One mark for the correct option.