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Coloured superoxides among the following...

Coloured superoxides among the following are `
i) LiO_(2)
ii) NaO_(2)
iii)KO_(2)
Iv) RbO_(2)`

A

All arae coloured

B

I,ii& iv only

C

I,iii&iv only

D

I,ii,& iii only

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The correct Answer is:
1
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