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Study of the First Element - Hydrogen — CHEMISTRY STD 9 — Question

ICSE BoardEnglish MediumSTD 9CHEMISTRYStudy of the First Element - Hydrogen1 Mark
Question
Which metal is preferred for collecting hydrogen from Cold water?Write the balanced equation.
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Answer

Cold water: Calcium
$\mathrm{Ca}+2 \mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{Ca}(\mathrm{OH})_2+\mathrm{H}_2$

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