TS EAMCET · Chemistry · Hydrogen
Dihydrogen can be prepared by which of the following reactions. (I) Reaction of granulated \(\mathrm{Zn}\) with dil. \(\mathrm{HCl}\) (II) Reaction of Zn with aq. \(\mathrm{NaOH}\) (III) By heating calcium hydrogen carbonate
- A (I) and (III)
- B (I), (II) and (III)
- C (I) and (II)
- D (II) and (III)
Answer & Solution
Correct Answer
(C) (I) and (II)
Step-by-step Solution
Detailed explanation
\(\because\) (I) \(\mathrm{Zn}+2 \mathrm{HCl}\) (dil.) \(\longrightarrow \mathrm{ZnCl}_2+\mathrm{H}_2\) and \(\because \text { (II) } \mathrm{Zn}+2 \mathrm{NaOH}(a q) \longrightarrow \mathrm{Na}_2 \mathrm{ZnO}_2+\mathrm{H}_2\) while calcium hydrogen carbonate, i.e. calcium…
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