Why is aluminium metal not used in the lab preparation of hydrogen?

Open in App

Solution

Due to its highly negative redox potential, $A l$ should react readily with water producing hydrogen gas but practically Al is passivated by formation of highly adhering surface film of aluminium oxide when $A l$ metal is oxidised and this interferes with the $A l$ water reaction at the surface of metal.

Suggest Corrections

Similar questions

Why are the following metals not used in the lab. preparation of hydrogen ?

(a) calcium (b) iron (c) aluminium (d) sodium

Why is nitric acid not used in the preparation of hydrogen?

Join BYJU'S Learning Program