CIE iGCSE Co-Ordinated Science C7.1 The characteristic properties of acids and bases Exam Style Questions Paper 2
Question
What happens when an acid reacts with an alkali?
(A) Neutralisation takes place and the temperature falls.
(B) Neutralisation takes place and the temperature rises.
(C) Reduction takes place and the temperature falls.
(D) Reduction takes place and the temperature rises.
▶️Answer/Explanation
Ans: B
Question
Universal indicator solution is added to test-tubes W, X and Y.
What are the colours of the universal indicator?
▶️Answer/Explanation
Ans: D
Question
Solid S is added to dilute hydrochloric acid in the apparatus shown.
The universal indicator solution shows the pH decreases.
What is solid S?
(A) zinc
(B) zinc carbonate
(C) zinc hydroxide
(D) zinc oxide
▶️Answer/Explanation
Ans: B
Question
Which statements about neutralisation are correct?
1 Acids and bases produce water when they neutralise each other.
2 During neutralisation, bases transfer protons to acids.
3 Neutral solutions turn universal indicator green.
4 During neutralisation, acids transfer hydroxide ions to bases.
A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4
▶️Answer/Explanation
Ans : A