The proposition ‘equal volumes of different gases contain equal numbers of molecules at the same temperature and pressure’ is known as
A. Avogadro’s hypothesis
B. Gay-Lussac’s hypothesis
C. Planck’s hypothesis
D. Kirchhoff’s theory
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Correct option (a) Avogadro’s hypothesis
Explanation:
The law is named after Amedeo Avogadro who, in 1811, hypothesized that two given samples of an ideal gas, of the same volume and at the same temperature and pressure, contain the same number of molecules.