A) \[{{K}_{2}}O\]
B) \[{{K}_{2}}{{O}_{4}}\]
C) \[K{{O}_{3}}\]
D) \[{{K}_{2}}{{O}_{3}}\]
Correct Answer: B
Solution :
[b] \[O_{4}^{2-}\] ion is not possible and \[{{K}_{2}}{{O}_{4}}\] is unknown.
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