KS3 Chemistry

Which of the following is a non metal?

• Silicon

• Aluminium

• Calcium

• Iron

Which of the following substances is a compound?

• Brass

• Hydrogen

• Water

• Air

Which of the following substances can not conduct electricity?

• Copper

• Gold

• Graphite

• Rubber

What are the products of the following reaction?
Calcium carbonate + Hydrochloric acid →

• Calcium chloride + water

• Calcium chloride + water + carbon dioxide

• Calcium chlorate + water

• Calcium chlorate + water + carbon dioxide

Which of the following displacement reactions would NOT work?

• Iron + Sodium chloride → Sodium +

  Iron chloride

• Magnesium + Copper sulfate → Copper +

  Magnesium sulfate

• Copper + Silver nitrate → Silver +

  Copper nitrate

• Potassium + Zinc oxide → Zinc +
  Potassium oxide

When universal indicator is added to a colourless aqueous solution, the solution turns orange. What could the pH of the solution be?

• 1

• 4

• 7

• 12

In which state of matter are particles very close together but can move around freely?

• Solid

• Liquid

• Gas

• Fluid

When hydrochloric acid is added to magnesium, a gas is given off that makes a squeaky pop noise when lighted. What is this gas?

• Helium

• Hydrogen

• Carbon dioxide

• Oxygen

The movement of particles from a high concentration to a low concentration is called

• refraction

• displacement

• oxidation

• diffusion

A mixture of dyes can be separated by

• evaporation

• filtration

• chromatography

• distillation