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Hydrogen — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryHydrogen2 Marks
Question
  1. How would you prepare dihydrogen from water by using a reducing agent?
  2. How would you prepare dihydrogen from a substance other than water?
  3. How would you prepare very pure $\text{H}_2$ in the laboratory?
  4. How would you prepare heavy hydrogen in the laboratory?
✓

Answer

  1. $2\text{Na}+2\text{H}_2\text{O}\xrightarrow{\ \ \ \ \ \ \ \ }2\text{NaOH}+\text{H}_2$
  2. $\text{Zn}+2\text{HCl}\xrightarrow{\ \ \ \ \ \ \ }\text{ZnCl}_2+\text{H}_2$
  3. It is obtained by electrolysis of acidified water.
  4. It is obtained by electrolysis of heavy water.

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