The redox reaction among the following is

The redox reaction among the following is
  1. 2NaOH+ Cl 2 NaCl+NaOCl+ H 2 O
  2. formation of ozone from atmospheric oxygen in the presence of sunlight
  3. reaction of [Co(H2O)6]Cl3 with AgNO3
  4. reaction of H2SO4 with NaOH

Solution

2NaOH+ Cl 2 NaCl+NaOCl+ H 2 O
Here Cl 2 is undergoing oxidation as well as reduction.In rest of these reactions oxidation states are not changing so these are not redox reactions.
3O22O3
2NaOH+H2SO4Na2SO4+2H2O
AgNO3+NaClNaNO3+AgCl

Asked in: MHT CET Full Test 3

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