iGCSE CHEM1a and 1b

Which state of matter has a definite (fixed) volume but no definite (fixed) shape?

• plasma
• gas
• liquid
• solid

What are the correct states in each row?

• 1. gas to solid 2. liquid to gas

• 1. 1.solid to gas 2. gas to liquid

• 1.gas to liquid 2. liquid to gas

• 1. solid to gas 2. solid to liquid

Describe the arrangement and movement of the particles in a gas

• The particles in a gas are tightly packed together and move in a straight line.
• The particles in a gas are in constant random motion and are far apart from each other. They move freely and rapidly in all directions.
• The particles in a gas are stationary and do not move at all.
• The particles in a gas move in a circular motion around each other.

Which substance is a gas at 100 degrees Celsius?

• W

• X

• Y

• Z

Which substance is a liquid at 1000°C and a gas at 2000°C?

• W

• X

• Y

• Z

Identify a method to separate a single food dye from a mixture of food dyes

• chromatography

• crystallisation

• fractional distillation

• simple distillation

Identify a method to separate water from copper(II) sulfate solution.

• chromatography

• crystallisation

• fractional distillation

• simple distillation

Identify a method to separate dry crystals of copper(II) sulfate from a solution.

• chromatography

• crystallisation

• fractional distillation

• simple distillation

Identify a method to separate ethanol and water

• chromatography

• crystallisation

• fractional distillation

• simple distillation

Identify a method to separate substances based on their differing boiling points.

• chromatography

• crystallisation

• fractional distillation

• simple distillation