First slide

Elemental forms of hydrogen

Question

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

Moderate

A

By passing over red hot cupric oxide.
B

By passing over iron at about 4500C
C

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

By passing over charcoal at a temperature of 173K

Solution

By cooling red hot palladium in a mixture of $H_{2} & N_{2}$ at increased pressures palladium absorbs hydrogen which is known as occlusion. The occluded hydrogen can be obtained in a pure state after removing $N_{2}$ gas.

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