CIE iGCSE Co-Ordinated Science C6.1 Physical and chemical changes Exam Style Questions Paper 2
Question
Which changes are chemical changes?
1. iron rusting
2. burning coal
3. dissolving sugar in water
4. boiling water
(A) 1 and 2 (B) 1 and 3 (C) 2 and 4 (D) 3 and 4
▶Answer/Explanation
Ans :A
Question
When solid zinc carbonate is heated, a different solid and a gas are formed.
Which type of change occurs?
A chemical
B exothermic
C physical
D separation
▶️Answer/Explanation
Ans : A
Question
Three different processes are listed.
1 heating ice to form water
2 lighting a match
3 removing zinc from sodium chloride solution by filtration
Which processes are physical changes?
A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only
▶️Answer/Explanation
Ans :C
Question
Some physical and chemical changes are listed.
1. Burning methane
2. Dissolving sugar in water
3. Evaporating ethanol
4. Rusting iron
Which changes are chemical changes?
A. 1 and 2
B. 1 and 4
C. 2 and 3
D. 3 and 4
▶️Answer/Explanation
Answer: B
Explanation: Burning methane and rusting iron are chemical changes because they involve the formation of new substances. Dissolving sugar and evaporating ethanol are physical changes.