Phosphorous normally exhibits a covalency of _____ and ____ .
Phosphorous normally exhibits a covalency of _____ and ____ .
A. `+1 and +2`
B. `+2 and +3 `
C. `+3 and +4`
D. `+3 and +5`
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Correct Answer - D
The usual oxidation state shown by any group 15 element is +5. But owing to inert pair effect, it is two units less than usual oxidation state and hence, the lower oxidation state shown by phosphorus is + 3.
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