AP EAMCET2003Chemistrys Block Elements
Which one of the following reactions occur at the anode, in the Castner process of extracting sodium metal ?
Options
- AH ₂ 2 H ⁺+2 e⁻
- B2 Cl ⁻ Cl ₂+2 e⁻
- C4 OH ⁻ 2 H ₂ O + O ₂+4 e⁻
- DNa ⁺+e⁻ Na
Correct answer
C. 4 OH ⁻ 2 H ₂ O + O ₂+4 e⁻
Step-by-step solution
In Castner process the process of extracting sodium metal can be written as, 4 NaOH 4 Na ⁺+4 OH ⁻ Its oxidation reaction which occurs at anode is 4 OH ⁻ 2 H ₂ O + O ₂+4 e⁻