Which can be used to generate \( \mathrm{H}_{2} \) ? (a) \( \mathrm{Al}+\mathrm{NaOH} \) (b) \( ...

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Which can be used to generate \( \mathrm{H}_{2} \) ?
(a) \( \mathrm{Al}+\mathrm{NaOH} \)
(b) \( \mathrm{Zn}+\mathrm{NaOH} \)
(c) \( \mathrm{Mg}+\mathrm{NaOH} \)
(d) \( \mathrm{LiH}+\mathrm{H}_{2} \mathrm{O} \)
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