Which metal is prefer for the preparation of hydrogen from water and acid

Solution:
Magnesium metal is preferred to give hydrogen with boiling water and acid.
$$\begin{gathered} Mg+H_{2}O\stackrel{}{\to }Mg{\left(OH\right)}_2+H_2 \\ \left(boiling\right) \\ Mg+H_{2}S{O}_4\stackrel{}{\to }MgS{O}_4+H_2 \end{gathered}$$