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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 Hydrogen2 Marks
Question
Name two metals which react with dilute sulphuric acid or dilute hydrochloric acid to liberate hydrogen gas. Support your answer by writing fully balanced equations of any one of the named metal with (a) dilute sulphuric acid (b) dilute hydrochloric acid.
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Answer

The metals that react with caustic soda or caustic potash to liberate hydrogen gas are Al, Zn, Pb and Cd.
$\begin{array}{l} Zn + H _2 SO _4 \rightarrow ZnSO _4+ H _2 \\ Zn +2 HCl \rightarrow ZnCl _2+ H _2 Mg + H _2 SO _4 \rightarrow MgSO _4+ H _2 \\ Mg +2 HCl \rightarrow MgCl _2+ H _2\end{array}$

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