CIE iGCSE Co-Ordinated Science C6.1 Physical and chemical changes Exam Style Questions Paper 1
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
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
Which type of reaction is used to manufacture lime from limestone?
(A) addition polymerisation
(B) cracking
(C) neutralisation
(D) thermal decomposition
▶️Answer/Explanation
Ans: D
Question
Four different substances are added to the same acid of the same concentration in reactions W, X, Y and Z.
The initial temperature of the acid before each reaction is 21 ºC.
The final temperatures of the mixtures are measured.
The results are shown.
Which row is correct?
▶️Answer/Explanation
Ans: B