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Q.

The common oxidation states of group-15 elements are

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a

- 3 and - 5

b

+3 and +5

c

-5 and +5

d

-3,+3 and +5

answer is D.

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Detailed Solution

Maximum oxidation state of 15th group elements=+5

Minimum oxidation state of 15th group elements =Group no. - 8

                                                                            =5 - 8 = -3

due to inert pair effect   = +3                                                  

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