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`CoCl_(4)^(2-)(aq)` is blue in color while `[Co(H_(2)O)_(6)]^(2+)` is pink. The color of reaction mixture `Co(H_(2)O)_(6)^(2+)(aq)+4Cl^(-)(aq)hArr CoCl_(4)^(2-)(aq)+6H_(2)O(l)` is blue at room temprature while it is pink when cooled heanceA. reaction is exothermicB. reaction is endothermicC. equlibrium will shift in forward direction on adding water to reaction mixtureD. equilibrium will not shift on adding water to equilibrium mixture. |
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Answer» Correct Answer - 2 As cooling pink colour intensifies so reaction is shifting in backward direction, so reaction must be endothermic. On adding water, the equilibrium will shift direction, as concentration of al species will decrease `K_(C)=((n_(CaCl_(4)^(2-)))/(n_(Co(H_(2)O)_(4)^(2+))xx(n_(Cl^(-)))^(4)))("Volume")^(4)` |
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