Very pure hydrogen (99.9) can be made by which of the following processes?

Reaction of methane with steam

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Mixing natural hydrocarbons of high molecular weight

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Electrolysis of water

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Reaction of salts like hydrides with water

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Solution

The correct option is D Reaction of salts like hydrides with water
Hydrides are instant source of hydrogen of higher purity. They react with $H_{2} O$ forming $H_{2}$ gas.
$C a H_{2} + 2 H_{2} O \to C a (O H)_{2} + 2 H_{2}$

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(99.9 %)

Highly pure Hydrogen (~99.9% ) can be obtained from:

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