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Q.

Of the following sets which one does not contain isoelectronic species?

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a

${BO}_{3}^{3 -}, {CO}_{3}^{2 -}, {NO}_{3}^{-}$

b

${SO}_{3}^{2 -}, {CO}_{3}^{2 -}, {NO}_{3}^{-}$

c

${CN}^{-}, N_{2}, C_{2}^{2 -}$

d

${PO}_{4}^{3 -}, {SO}_{4}^{2 -}, {ClO}_{4}^{-}$

answer is C.

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Detailed Solution

The number of electrons of each species in the choice a is 50.

The number of electrons of each species in the choice b is 14.

The number of electrons of each species in the choice c are:

${SO}_{3}^{2 -} (42), {CO}_{3}^{2 -}$ and ${NO}_{3}^{-} (42)$ .

The number of electrons of each species in the choice d is 32.

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Of the following sets which one does not contain isoelectronic species?