Q.

Oxidation number of potassium in K2O, K2O2 and KO2, respectively is: 
 

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a

+1,+2 and +4 
 

b

+2, +1 and +12
 

c

+1,+1 and +1 
 

d

+1,+4 and +2 
 

answer is D.

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Detailed Solution

xidation number in K2+1​O−2

Hence, oxidation number of Potassium in K2​O is +1

Oxidation number in K2+1​O2−1​

Hence, O.N. of Potassium in K2​O2​ is +1 

O.N. in K+1O2​−0.5​

Hence, O.N of K in KO2 is +1

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