Question

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)

Answer 1

Option no. 2  Balanced equation     

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