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Which balanced equation represents a redox

reaction?

(1) CuCO3(s) ==> CuO(s) + CO2(g)

(2) 2KClO3(s)==>2KCl(s) + 3O2(g)

(3) AgNO3(aq) + KCl(aq) ==>AgCl(s) + KNO3(aq)

(4) H2SO4(aq) + 2KOH(aq)==> K2SO4(aq) + 2H2O(l)

Verified Answer :

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Option no. 2  Balanced equation     

2KClO3(s)⇒2KCl(s) + 3O2(g)
      K=2             K=2
      Cl=2            Cl=2
      O=6             O=6

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