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Unit - 7.1 Methods for the preparation of Hydrogen — CHEMISTRY STD 8 — Question

ICSE BoardEnglish MediumSTD 8CHEMISTRYUnit - 7.1 Methods for the preparation of Hydrogen1 Mark
Question
Name four metals which react with caustic soda 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.
✓

Answer

The metals that react with caustic soda or caustic potash to liberate hydrogen gas are Al, Zn, Pb and Cd.
Reactions:
$
2 Al(s)+2 NaOH(aq)+6 H_2 O(l) \quad \rightarrow \quad 2 Na\left[Al(OH)_4\right] \text { (sodium aluminate) }+3 H_2(g)
$

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