If chlorine gas is passed through hot NaOH solution, two changes are observed in the oxidation number of chlorine during the reaction. These are ________ and _________.


6NaOH + 3Cl2 5NaCl + NaClO3 +H2O


Let x be the oxidation state of chlorine.


Oxidation state of Cl is -1 ( x + 1 =0, x= -1)


Oxidation state of chlorine in NaClO3 is +5 ( x + 3*(-2) +1 = 0, x= 5)


Hence the correct options are (i) and (iii)

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