This set of MCQs helps you brush up on important chemistry topics and prepare you to dive into skill practice.
The three states of matter are represented by diagrams X, Y and Z. Which change occurs during condensation?
X to Z
Y to X
X to Y
Z to X
Which description best matches this particle model?
Particles are close together but can slide past each other.
Closely packed and vibrate about a fixed position.
Particles have lots of energy and can move around.
None of these
Their particles are packed closely together without a fixed regular pattern.
What is the name given to change of state from a solid to a liquid?
How many changes of state occur in this graph?
Which of the following events is an example of a chemical change?
A candle burns.
Liquid nitrogen evaporates.
Which of the following statements about helium, neon, and argon is true?
They react with other substances in a similar way.
They are solids at a temperature of 25 °C.
They have the same number of neutrons.
They have the same number of protons.
Elements consist of a single type of atom.