\( \mathrm{CrO}_{3} \) dissolves in aqueous \( \mathrm{NaOH} \) to give : (a) \( \mathrm{Cr}_{2}...

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\( \mathrm{CrO}_{3} \) dissolves in aqueous \( \mathrm{NaOH} \) to give :
(a) \( \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-} \)
(b) \( \mathrm{CrO}_{4}^{2-} \)
(c) \( \mathrm{Cr}(\mathrm{OH})_{3} \)
(d) \( \mathrm{Cr}(\mathrm{OH})_{2} \)
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