Q43 / 225 · JEE Main 2005 · Chemistry

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

A
$$ \mathrm{PO}_4^{-3}, \mathrm{SO}_4^{-2}, \mathrm{ClO}_4^{-} $$
B
$\mathrm{CN}, \mathrm{N}_2, \mathrm{C}_2^2$
Correct answer
C
$\mathrm{SO}_3^{-2}, \mathrm{CO}_3^{-2}, \mathrm{NO}_3^{-}$
D
$\mathrm{BO}_3^{-3}, \mathrm{CO}_3^{-2}, \mathrm{NO}_3$

Hence, the correct answer is option: 'C'.

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