Which of the following pair of reagents can be used for producing hydrogen gas?
(I) $Zn +$ dil. $H_{2} SO_{4}$ (II) $Zn + NaOH$ (III) $Al + HCl (g)$ (IV) $Al + NaOH$

Question

Which of the following pair of reagents can be used for producing hydrogen gas? (I) Zn + dil. H 2 ​ SO 4 ​ (II) Zn + NaOH (III) Al + HCl ( g ) (IV) Al + NaOH

TestHub · Accepted Answer

Zn + dil. H 2 ​ SO 4 ​ → ZnSO 4 ​ + H 2 ​ Zn + NaOH → Na 2 ​ [ Zn ( OH ) 4 ​ ] + H 2 ​ Al + HCl → AlCl 3 ​ + H 2 ​ Al + NaOH + H 2 ​ O → Na [ Al ( OH 4 ​ ) ] + H 2 ​

Chemistry - Hydrogen and Its compound Question with Solution | TestHub

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