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प्रश्न
Explain the preparation of hydrogen using electrolysis.
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: \[\ce{H2O -> H2 + 14O2}\]
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संबंधित प्रश्न
Volume strength of 1.5 N H2O2 is
Hydrogen peroxide is obtained by the electrolysis of ______.
Which of the following statement(s) is/are correct in the case of heavy water?
(i) Heavy water is used as a moderator in nuclear reactor.
(ii) Heavy water is more effective as solvent than ordinary water.
(iii) Heavy water is more associated than ordinary water.
(iv) Heavy water has lower boiling point than ordinary water.
How is heavy water prepared? Compare its physical properties with those of ordinary water.
Give a method for the manufacture of hydrogen peroxide and explain the reactions involved therein.
What mass of hydrogen peroxide will be present in 2 litres of a 5 molar solution? Calculate the mass of oxygen which will be liberated by the decomposition of 200 mL of this solution.
Which of the following will happen when a little hydrogen peroxide is added to a solution of ferrous sulphate?
H2O2 can be obtained when the following reacts with H2SO4 except with:
The volume of '10 Vol' of H2O2 required to liberate 500 mL O2 at NTP is ______.
The strength of the 11.2 volume solution of H2O2 is ______.
[Given that molar mass of H = 1 g mol−1 and O = 16 g mol−1)
