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In the Preparation of Oxygen by the Thermal Decomposition of Potassium

Question 13

Multiple Choice

In the preparation of oxygen by the thermal decomposition of potassium chlorate shown below,what is the oxidation number change of the atom undergoing reduction?
2 KClO3(s) → 2 KCl(s) + 3 O2(g)


A) - 8
B) - 6
C) + 1
D) + 2

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