In diaphragm cell, hydrogen is discharged by the reduction of
Correct answer: D. NaCl
- A. water
- B. HCl
- C. Na+
- D. NaCl
Explanation
This is the correct answer. In a diaphragm cell, the reduction of water at the cathode is an undesirable side reaction. To prevent this, a diaphragm separates the cathode and anode compartments. Sodium ions migrate through the diaphragm to the anode, but chloride ions cannot. At the cathode, sodium ions are reduced to sodium metal, which reacts with water to produce hydrogen gas and sodium hydroxide:2Na+ + 2H2O(l) -> 2H2(g) + 2NaOH(aq)Therefore, the reduction of NaCl indirectly leads to the production of hydrogen in a diaphragm cell.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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