Page 10 - ACE YR IGCSE A TOP APPROACH TO CHEM

(f) A long latex balloon is twisted and made into the shape of an animal.

Explain why the balloon can be compressed.

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[2]
[Total: 13]

6 Ammonium chloride is formed when ammonia, NH reacts with hydrochloric acid, HCl.
3
Ammonium chloride

Mineral wool soaked Mineral wool soaked
with ammonia with hydrochloric acid

(a) What is the colour of ammonium chloride?

[1]

(b) Write the chemical equation for the reaction.

[1]

(c) Name the process of the phenomenon above.

[1]

(d) Explain how ammonium chloride is formed.

[2]
(e) Explain why ammonium chloride formed is nearer to the end of the tube containing
mineral wool soaked with hydrochloric acid.

[2]

(f) If the tube is heated, what change will be observed?

[1]

Chapter 1 States of Matter 7

Chapter 1.indd 7 3/4/22 11:57 AM