Question

Name four metals which react with caustic sods or caustic potash solution on boiling and liberate hydrogen gas. Support your answer by writing a fully balanced equation for any one of the above named metals ( hydrogen)

Answer 1

The metals that react with caustic soda or caustic potash to liberate hydrogen gas are Al, Zn, Pb and Cd.

Reactions:

2Al(s) + 2NaOH(aq) + 6H₂O(l) $\to$ 2Na[Al(OH)₄] (sodium aluminate) + 3H₂(g)