When chlorine is passed through hot solution of caustic soda the reaction is said as___________________?
Correct answer: C. Disproportionation reaction
- A. Displacement
- B. Reduction
- C. Disproportionation reaction
- D. Double displacement reaction
Explanation
Hot concentrated caustic soda reacts with chlorine as 3Cl2 + 6NaOH -> 5NaCl + NaClO3 + 3H2O. Chlorine is reduced from oxidation state 0 to -1 in chloride and oxidised to +5 in chlorate, so the same element undergoes both processes. This is disproportionation, not simple reduction or displacement.
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About Redox Reactions
Redox reactions involve oxidation and reduction occurring together, with electrons transferred between species or oxidation numbers changing. The topic covers assigning oxidation states, identifying oxidizing and reducing agents, balancing redox equations by oxidation number or half-reaction methods, and connecting chemical changes with galvanic and electrolytic cells.
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