MHT CET202122 Sep 2021Evening ShiftChemistryElectrochemistryActual
Pure dihydrogen (99.5 %) is obtained by the electrolysis of
Options
- ANaOH _ ( aq ) using Zn electrode
- Bpure water
- Cdil. H ₂ SO ₄ using cadmium electrodes
- Dwarm barium hydroxide using Ni electrodes
Correct answer
D. warm barium hydroxide using Ni electrodes
Step-by-step solution
- In the laboratory, high purity compounds can be obtained only with electrolysis. - Similarly, highly purified dihydrogen is also obtained by electrolyzing water using a small amount of acid or base. - Here, Ba ( OH )₂ is a base. Hence, electrolyzing water in the presence of a base Ba ( OH )₂ gives us the highly purified (> 99.95 % ) Dihydrogen ( H ₂ ) using Ni electrodes.