Pure Substances and Mixtures Quiz

What is matter?

• Anything that has volume and mass

• Anything that is visible

• Anything that is solid

• Anything that can be touched

Which of the following is a pure substance?

• A mixture of sand and salt

• A pure sheet of iron

• A glass of lemonade

• A bowl of salad

What is a characteristic of a pure substance?

• It is made up of identical particles

• It can be separated by physical processes

• It is made up of different types of particles

• It has non-uniform composition

Which of the following is an example of a mixture?

• Sugar solution

• Pure iron

• Pure gold

• Distilled water

Why are all elements considered pure substances?

• They are made up of different types of atoms

• They have the same properties and sizes throughout

• They are always in solid form

• They can be separated by physical processes

What is the smallest unit of an ionic compound?

• Molecule

• Atom

• Formula unit

• Ion

Which of the following is NOT a pure substance?

• Table salt

• Water

• Air

• Copper

How are particles combined in a mixture?

• None of the above

• Both chemically and physically

• Physically

• Chemically

Which of the following statements is true about pure substances?

• They have non-uniform composition

• They have uniform composition throughout

• They are always mixtures

• They can be separated into simpler substances by physical processes

What is a key difference between pure substances and mixtures?

• Mixtures have the same chemical properties throughout

• Mixtures have uniform composition throughout

• Pure substances have identical particles

• Pure substances can be separated by physical processes