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Identify the correct statement.
(1) All \( \mathrm{Cr}-\mathrm{O} \) bond length in \( \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \) are equal
(2) Hybridization of \( \mathrm{Cr} \) in \( \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \) is \( \mathrm{dsp}^{2} \)
(3) Equivalent mass of \( \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \) is \( \mathrm{M} / 6 \) in acidic medium
(4) \( \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \) is stable in alkaline medium
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