Which of the following states Avogadros Law?

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Q: 26 (CDS-I/2004)
Which of the following states Avogadros Law?

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,42,31,12,12,42,7

keywords: 

{'states avogadros law': [0, 0, 1, 0], 'diffusion': [4, 1, 4, 12], 'density': [2, 0, 1, 3], 'constant temperature': [0, 0, 2, 0], 'atomic weight': [0, 0, 1, 2], 'gases': [0, 0, 5, 12], 'specific heat': [0, 0, 0, 3], 'equal volumes': [0, 0, 2, 3], 'temperature': [0, 1, 1, 7], 'molecules': [0, 0, 1, 1], 'pressure': [0, 0, 0, 1], 'volume': [0, 0, 1, 0], 'similar conditions': [0, 0, 1, 0], 'gas': [9, 1, 9, 27], 'mass': [0, 0, 2, 3], 'solid element': [0, 0, 1, 0]}

Avogadro`s Law, stated in option 3, states that equal volumes of all gases under similar conditions of temperature and pressure contain equal numbers of molecules. This means that if we have two containers of different gases, but the volumes and conditions of temperature and pressure are the same, the number of molecules in each container will be the same.

Option 1 states that the production of specific heat and atomic weight of a solid element is constant, which is unrelated to Avogadro`s Law.

Option 2 states that the pressure of a fixed mass of a gas at constant temperature is inversely proportional to its volume. This is known as Boyle`s Law and is not the same as Avogadro`s Law.

Option 4 states that at a constant temperature and pressure, the rate of diffusion of a gas is inversely proportional to the square root of its density. While this is a valid statement, it is not related to Avogadro`s Law.

Therefore, the correct answer is option 3 as it accurately states Avogadro`s Law.