Advertisements
Advertisements
प्रश्न
Explain the preparation of hydrogen using electrolysis.
Advertisements
उत्तर
High purity of hydrogen (>99.9%) is obtained by the electrolysis of water containing traces of acid or alkali or electrolysis of an aqueous solution of sodium hydroxide or potassium hydroxide using a nickel anode and iron cathode. This process is not economical for large-scale production.
- At anode: \[\ce{2OH^- -> H2O + 1/2O2 + 2e^-}\]
- At cathode: \[\ce{2H2O + 2e^- -> 2OH^- + H2}\]
- Overall reaction: \[\ce{H2O -> H2 + 14O2}\]
APPEARS IN
संबंधित प्रश्न
Volume strength of 1.5 N H2O2 is
Mention the uses of deuterium.
Hydrogen peroxide is ______.
Hydrogen peroxide is obtained by the electrolysis of ______.
How is heavy water prepared? Compare its physical properties with those of ordinary water.
Hydrogen peroxide is obtained by the electrolysis of ______.
Which of the following will happen when a little hydrogen peroxide is added to a solution of ferrous sulphate?
Hydrogen peroxide for the first time was prepared by:
The products obtained from a reaction of hydrogen peroxide and acidified potassium permanganate are ______.
In a basic medium, H2O2 exhibits which of the following reactions?
(A) \[\ce{Mn^{2+} -> Mn^{4+}}\]
(B) \[\ce{I2 -> I^-}\]
(C) \[\ce{PbS -> PbSO4}\]
Choose the most appropriate answer from the options given below.
