Page 13 - ACE YR IGCSE A TOP APPROACH TO CHEM

(b) In the tube below, a white solid is formed when the colourless gases hydrogen bromide
and ethylamine come into contact.

Gives off CH 3 CH 2 NH 2 (g) Gives off HBr(g)

A B C

Cotton wool soaked Cotton wool soaked in
in ethylamine(aq) concentrated hydrobromic acid
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Predict the position, A, B, or C, where the white solid will form. Explain your choice.

[3]
[Total: 5]

Clone May / June 2014
10 Use the kinetic particle theory to explain each of the following.

(a) Pressure increases when a gas is compressed.

[3]

(b) Liquids have a fixed volume but no definite shape. They take the shape of the container.
Gases do not have a fixed volume or a fixed shape. They also take the shape of the container.

Liquid Gas

[3]
[Total: 6]

Cambridge IGCSE TM
10 Ace Your Chemistry

Chapter 1.indd 10 3/4/22 11:57 AM