JEE Main 7 Jan 2020 Shift 1 Solved Paper

Section: Chemistry

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Question : 45 of 75

Marks: +1, -0

Oxidation number of potassium in K2O,K2O2‌and‌K‌O2, respectively, is :

[7-Jan-2020 Shift 1]

+1, +4 and +2
+1, +2 and +4
+1, +1 and +1
+2 , +1 and +
1
2

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