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chemistry igcse acapprinted 9 · PDF 9
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9
Liquid particles placed inside sealed containers have fixed positions
In which substance are the particles close together and slowly moving past each other ?
Ice
Air
Water
Steam
Which of the following correctly describes the movement of particles in a solid according
to the kinetic particle theory?
Particles move randomly and are far apart.
Particles vibrate in fixed positions
Particles slide past each other freely
Particles move rapidly in all directions.
P4 :
Q1 : Give the name of the process when a gas turns into a liquid
Q2 : Give the name of the process when a solid turns directly into a gas
Q3 : Why does the temperature not increase during state change even though the
substance is being heated
Q4 : Compare the movement and arrangement of particles in solid nitrogen to
gaseous nitrogen
Q5 : A sealed container contains nitrogen gas. Using the Kinetic theory, explain why
the pressure inside the container increases when the temperature is increased
Chapter 2 : Atoms , Elements and Compounds
Atoms , Elements and Compounds
• All matter around us is made of tiny particles (atoms and molecules).