Chemistry · Laws of chemical combination, Atomic and molecular masses

Which of the following statement about Avogadro's hypothesis is correct?

Which of the following statement about Avogadro's hypothesis is correct?

  • A. Under similar conditions of temperature and pressure, gases react with each other in simple ratio.
  • B. Under similar conditions of temperature and pressure, equal volumes of all gases contain same number of molecules
  • C. At NTP all gases contain same number of molecules
  • D. Gases always react with gases only at the given temperature and pressure

Step-by-step solution

Avogadro's hypothesis states that at the same temperature and pressure, equal volumes of all gases contain an equal number of molecules. This is a fundamental law of chemical combination. Option A describes Gay-Lussac's law of combining volumes, option C is imprecise because it doesn't specify equal volumes, and option D is false.
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