MCQ
In the compounds KMnO4 and K2Cr2O7, the highest oxidation state is of the element.
- APotassium
- BChromium
- COxygen
- DManganese
Explanation:
In KMnO4, K is in +1 oxidation state, O is in -2 oxidation state Mn is present in +7 oxidation state.
In K2Cr2O7, K is in +1 oxidation state, O is in -2 oxidation state Cr is present in +6 oxidation state.
So Mn is present in highest oxidation state.
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$A : 1s^2\, 2s^2\, 2p^6$
$B : 1s^2\, 2s^2\, 2p^6\, 3s^2\, 3p^3$
$C : 1s^2\, 2s^2\, 2p^6\, 3s^2\, 3p^5$