In the industrial production of which of the following, molecular hydrogen is obtained as a by product?

Question

TestHub · Accepted Answer

Sodium hydroxide is generally prepared commercially by electrolysis of sodium chloride in castner Kellner cell.

at cathode : $Na + e^{-} Hg Na^{-}$ amalgum

Anode : $Cl^{-} \to \frac{1}{2} Cl_{2} + e^{-}$

The $Na_{i}$ Vamalgam is treated with water to give sodium hydroxide and hydrogen gas :

$2 Na (amalgam) + H_{2} O \to 2 NaOH + H_{2} + 2 Hg$

Chemistry - Hydrogen and Its compound Question with Solution | TestHub