Which of the following will diffuse faster?

H_{2}

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F e

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N a

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H g

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Solution

The correct option is C $H_{2}$
H2 is hydrogen gas and it will diffuse the fastest as all other options contain metals either in solid state(Fe and Na) or liquid state(Hg). This is due to the fact that gases diffuse easily and faster than liquids and solids.

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