Answer: Do not react chemically with each other.
- A React chemically with each other
- B Do not react chemically with each other
- C Are all monoatomic
- D Have equal molar masses
Correct answer: B. Do not react chemically with each other
Explanation: Dalton Law applies strictly to mixtures of non-reacting gases, where total pressure is the sum of partial pressures.

Boyle's law: at constant temperature the pressure of a fixed mass of gas is inversely proportional to its volume (P ∝ 1/V), so the P–V plot is a hyperbola — halving the volume doubles the pressure. Image: Reginaprice2013, CC BY-SA 3.0, via Wikimedia Commons.
Concept context
Discover why gases expand to fill any container while liquids flow and solids hold their shape. Master the gas laws, the ideal gas equation, and the reasons real gases deviate from ideal behavior.