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When hydrochloric acid is added to cobalt nitrate solution at room temperature, the following reaction takes place and the reaction mixture become blue. On

cooling the mixture it becomes pink. On the basis of this information choose the correct answer.
\[
\begin{array}{r}
{\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}(\mathrm{aq})+4 \mathrm{Cl}^{-}(\mathrm{aq}) \rightleftharpoons\left[\mathrm{CoCl}_{4}\right]^{2-}(\mathrm{aq})} \\
+6 \mathrm{H}_{2} \mathrm{O}(l)
\end{array}
\]
(1) for the reaction
(2) for the reaction
(3) for the reaction
(4) The sign of cannot be predict on the basis of this information📲PW App Link - https://bit.ly/YTAI_PWAP 🌐PW Website - https://www.pw.live