Question

Choose the correct answer from the options given below:

The gas law which relates the volume of gas to the number of molecules of a gas is

• A. Avogadro's Law
• B. Gay-Lussac's law
• C. Boyle's law
• D. Charles' law

Answer 1

The correct option is A

Avogadro's Law

Explanation for correct option:

(A) Avogadro's Law

• It states that the equal volumes of all gases involve the same number of molecules. The conditions required is same pressure and temperature.

Hence, the correct option is (A), Avogadro's Law.

Explanation for incorrect options:

(B) Gay-Lussac's law

• According to this law, when gases react to form new gases, the ratio of the volume of gaseous reactants to the gaseous products is expressed as a simple whole-number ratio. The conditions required are constant pressure and temperature.
• This law is only applicable to gases. As a result, the volumes of solids and liquids are assumed to be zero.

(C) Boyle's law

• At constant temperature, the volume of a gas varies indirectly with the pressure applied on the gas.
• It can be depicted as follows:

$PV=k$

Here, $P$ is the pressure of the gas, $V$ is the volume of the gas, and $k$ is a constant.

(D) Charles' law

• At constant pressure, the volume of a gas varies directly with the absolute temperature of the gas.
• It can be depicted as follows:

$V=kT$

Here, $V$ is the volume of the gas, $T$ is the absolute temperature and $k$ is a constant.

Hence, the correct option is (A). “The gas law which relates the volume of gas to the number of molecules of a gas is Avogadro's Law.”