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🧪 Chemistry  ·  States of Matter  ·  NEET & JEE

Dalton Law of partial pressures applies to a mixture of gases that:

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.

Graph of pressure versus volume for a fixed amount of gas at constant temperature: the curve falls steeply then flattens, a hyperbola showing pressure inversely proportional to volume.

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.

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