Q. A complex is represented as $CoCl_{3}.xH_{2}O$ . Its $\text{0} \text{.1} \, \text{m}$ solution in aqueous medium shows $\Delta T_{f}= \, 0.558 \, K$ . $K_{f}$ for water is $1.86 \, kg \, m o l^{- 1} \, K$ and assuming $\text{100\%}$ ionisation of the complex having coordination number $\text{6}$ . The formula of the complex is
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