Matter classification YBTC4a

Which of the following is an example of a pure substance?

• Air

• Water

• Saltwater

• Milk

Which of the following is an element?

• Water (H₂O)

• Sodium chloride (NaCl)

• Oxygen (O₂)

• Carbon dioxide (CO₂)

What is an allotrope of carbon?

• Water

• Diamond

• Salt

• Oxygen

Which of the following is not a binary compound?

• Sodium chloride (NaCl)

• Water (H₂O)

• Sodium sulfate (Na₂SO₄)

• Carbon dioxide (CO₂)

Which of the following is a binary compound?

• Sodium chloride (NaCl)

• Water (H₂O)

• Sodium sulfate (Na₂SO₄)

• Carbon dioxide (CO₂)

Which of these statements is true about compounds?

• Compounds are made up of only one type of element.

• Compounds are mixtures of different substances.

• Compounds are made of atoms of different elements.

• Compounds cannot be broken down into simpler substances.

Which of these is a ternary compound?

• Sodium chloride (NaCl)

• Calcium carbonate (CaCO₃)

• Water (H₂O)

• Oxygen (O₂)

Which of the following is a property of pure substances?

• They can be easily separated into other substances.

• They consist of only one type of atom or molecule.

• They always have a variable composition.

• They are always mixtures of elements.

Which of the following is an example of a binary compound?

• Ammonia (NH₃)

• Carbon monoxide (CO)

• Potassium nitrate (KNO₃)

• Sodium carbonate (Na₂CO₃)

What is the main difference between an element and a compound?

• An element is a mixture of two or more substances.

• A compound is made of two or more different elements chemically combined.

• An element cannot combine with another element.

• Compounds have only one type of atom.