Question

Very pure hydrogen $\left(99.9\%\right)$ can be made by which of the following processes?

• A. Mixing natural hydrocarbons of high molecular weight
• B. Electrolysis of water
• C. Reaction of salt like hydrides with water
• D. Reaction of methane with steam.

Answer 1

The correct option is C Reaction of salt like hydrides with water

Very pure $H_2\left(99.9\%\right)$ is prepared by the action of water on salt hydrides (eqNaH)
$NaH+H_{2}O\to NaOH+H_2$