Question

03 The gas with minimum speed at room temperature is A. He B. Ne CH D. F2​

Answer 1

Answer:

Explanation:He

Answer 2

Answer:

Fluorine gas (F2) has the minimum Speed. Therefore, the correct option is D.

Explanation:

The speed of a gas particle is dependent on the mass of gaseous atoms or molecules. Higher the mass lower will be the speed of an object. As the speed of a gas can be calculated using rms speed, Vrms.

Vrms = √ 3RT/√ M,

Since mass is inversely proportional the speed therefore the gas with maximum mass will have the lowest speed. Among all the four gases,  Fluorine has highest mass (37.99 g/mol) whereas the mass of Ne is 20 g/mol, mass of H is 1 g/mol and the mass of He is 4 g/mol. Hence, the fluorine will have the lowest speed.

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