Which of the following method can be used to separate hydrogen gas from nitrogen gas?

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By passing over red hot cupric oxide.

By passing over iron at about 4500C

By passing over hot palladium metal at high pressures and then cooling.

By passing over charcoal at a temperature of 173K

answer is C.

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Detailed Solution

By cooling red hot palladium in a mixture of H2 & N2 at increased pressures palladium absorbs hydrogen which is known as occlusion. The occluded hydrogen can be obtained in a pure state after removing N2 gas.

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