Chemistry Unit C1 Worksheet - Study And Revision Pack (Foundation Paper) Page 15
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34C1.3 Exam Questions – 28 marks, 28 minutes
Q1
(a) In this apparatus hydrochloric acid is decomposed by passing a direct electric current through
it.
Chlorine and hydrogen are formed.
(i) Give the name of this process in which substances, such as hydrochloric acid, are decomposed
by a direct electric
current.
(1)
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(ii) Describe what happens when a burning splint is applied to a mixture of hydrogen and air in a test
tube.
(2)
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(b) (i) Complete the sentence by putting a cross (
) in the box next to your answer.
An acid is present in the stomach of humans.
This acid is
(1)
A ethanoic acid
B hydrochloric acid
C nitric acid
D sulfuric acid
(ii) Some people suffer from indigestion and take indigestion remedies.
Which of these could cure indigestion caused by excess acid?
Put a cross (
) in the box next to your answer.
(1)
A sodium chloride
B carbon dioxide
C calcium carbonate
D hydrogen chloride
(iii) Explain how an indigestion remedy works when it cures acid indigestion.
(2)
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