The ionic radius of \( \mathrm{Cr} \) is minimum in which of the fo...

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The ionic radius of \( \mathrm{Cr} \) is minimum in which of the following compounds ?
(1) \( \mathrm{CrF}_{3} \)
(2) \( \mathrm{CrCl}_{3} \)
(3) \( \mathrm{Cr}_{2} \mathrm{O}_{3} \)
(4) \( \mathrm{K}_{2} \mathrm{CrO}_{4} \)
\( \mathrm{P} \)
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