Anion \( \left(X^{2-}\right) \) is: (a) \( \mathrm{CO}_{3}^{2-} \) (b) \( \mathrm{SO}_{3}^{2-} \...

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Anion \( \left(X^{2-}\right) \) is:
(a) \( \mathrm{CO}_{3}^{2-} \)
(b) \( \mathrm{SO}_{3}^{2-} \)
(c) \( \mathrm{S}^{2-} \)
(d) \( \mathrm{S}_{2} \mathrm{O}_{3}^{2-} \)
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