CIE iGCSE Co-Ordinated Science C11.6 Alcohols Exam Style Questions Paper 1
Question
Four molecules are shown.
Which structure represents ethanol?
A. H–C–C–OH
B. H–C–O–C–H
C. H–C–C–H
D. H–C–O–H
▶️Answer/Explanation
Answer: A. H–C–C–OH
Explanation: Ethanol has the molecular formula C₂H₅OH, which corresponds to the structure H–C–C–OH.
Question
What are the products of the complete combustion of ethanol?
A carbon dioxide and hydrogen
B carbon dioxide and water
C carbon monoxide and hydrogen
D carbon monoxide and water
▶️Answer/Explanation
Ans :A
Question
Which method is used to make ethanol?
A fermentation of sugar by yeast
B reacting ethane with bromine
C reacting ethene with bromine
D reacting methane with steam
▶️Answer/Explanation
Ans : A
Question
Which process forms ethanol?
(A) combustion
(B) cracking
(C) distillation
(D) fermentation
▶️Answer/Explanation
Ans : D
Question
Ethanol is manufactured by reacting ethene with steam in the presence of a catalyst. Which type of reaction occurs?
A addition
B oxidation
C polymerisation
D reduction
▶️Answer/Explanation
Answer: A addition
Explanation: The reaction between ethene and steam to produce ethanol is an addition reaction, where water (H₂O) adds across the double bond of ethene (C₂H₄).