Question

Question 8.24 Refer to the periodic table given in your book and now answer the following questions:

(a) Select the possible non metals that can show disproportionation reaction.

(b) Select three metals that can show disproportionation reaction.

Class XI Redox Reactions Page 274

Answer 1

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Answer 2

(a) phosphorus,chlorine and sulphur can show disproportionation reaction,
  P₄ + 3OH⁻ + 3H₂O -----> PH₃ + 3H₂PO₂
             here, Phosphorus is oxidised as well as reduced.
similarly, for chlorine, Cl₂ + 2OH⁻ ------------>Cl⁻ + ClO⁻ +H₂O
  for sulphur, S₈ + 12OH⁻ ------->4S²⁻  + S₂O₃ + 6H₂O

(b) manganese, copper and  gallium can show disproportionation reaction :
for manganese,
    2Mn³⁺  + 2H₂O -------------> MnO₂ + Mn²⁺ + 4H⁺
For copper,
    2Cu⁺ --------------------------> Cu²⁺ + Cu
for gallium,
    3Ga  ----------------------------> Ga³⁺  + 2Ga