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Q114 (NDA-I/2023) Science & Technology › Basic Science (Physics, Chemistry, Biology) Official Key

Equal volume of all gases, when measured at the same temperature and pressure, contain an equal number of particles. Who proposed the above law ?

Explanation

The statement provided is the definition of Avogadro’s Law, proposed by the Italian scientist Amedeo Avogadro in 1811. This fundamental principle of chemistry states that under identical conditions of temperature and pressure, equal volumes of different gases contain an equal number of molecules, regardless of their chemical or physical properties.

  • Option C (Avogadro): Correct. This law helped in distinguishing between atoms and molecules and led to the determination of the Avogadro constant.
  • Option A (Charles): Incorrect. Charles's Law states that the volume of a gas is directly proportional to its absolute temperature at constant pressure.
  • Option B (Boyle): Incorrect. Boyle's Law states that the pressure of a gas is inversely proportional to its volume at constant temperature.
  • Option D (Lussac): Incorrect. Gay-Lussac's Law states that the pressure of a gas is directly proportional to its absolute temperature at constant volume.
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