Which type of reaction involves one element displacing another from a compound?
ACombination reaction
BDecomposition reaction
CDisplacement (single
DDouble displacement reaction
Question 2
The rusting of iron requires the presence of:
AOnly oxygen from air
BOnly water (moisture)
CBoth oxygen and water
DCarbon dioxide and water only
Question 3
In the reaction: 2Mg + O2 → 2MgO, magnesium is:
AReduced (gains oxygen)
BOxidised (loses electrons / gains oxygen)
CThe oxidising agent
DNeither oxidised nor reduced
🔒
Unlock the Full Quiz
Get all 20 questions with answer options, instant scoring, and detailed explanations for every question — plus full access to all chapters, PDFs, and mock tests.