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← JEE Advanced 2021 · Paper 2
ChemistryInteger+4Question 38 of 57

JEE Advanced 2021 · Paper 2, Chemistry question 19

Ozonolysis of ClOX2\ce{ClO2} produces an oxide of chlorine. The average oxidation state of chlorine in this oxide is ____.

Answer and worked solution

Official answer: 6

The product. Ozone oxidises chlorine dioxide to dichlorine hexoxide:
2 ClOX2+2 OX3→ClX2OX6+2 OX2.\ce{2ClO2 + 2O3 -> Cl2O6 + 2O2}.

Oxidation state. In ClX2OX6\ce{Cl2O6}, 2x=122x=12, so the average oxidation state of Cl is +6.