A-LevelChemistryChemical periodicity9701/12 · Feb/Mar 2022 · Q171 Mark
A student investigated the chloride of a Period 3 element. This is what the student wrote down as a record. "The compound was a white crystalline solid. It dissolved easily in water to give a solution of pH 12. When placed in a test-tube and heated in a roaring Bunsen flame, the compound melted after several minutes heating." What can be deduced from this record?
AAt least one of the recorded observations is incorrect.
BThe compound was magnesium chloride, MgCl₂.
CThe compound was phosphorus pentachloride, PCl₅.
DThe compound was sodium chloride, NaCl.
✓ Correct answer
A: At least one of the recorded observations is incorrect.
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Chemical periodicity and see which topics are most likely to come up next.
Sign up free →