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  • For the following Assertion and Reason, the correct option is Assertion (A) : When Cu (II) and sulphide ions are mixed, they react together extremely quickly to give a solid. Reason (R): The equilibrium constant of

For the following Assertion and Reason, the correct option is Assertion (A) : When Cu (II) and sulphide ions are mixed, they react together extremely quickly to give a solid. Reason (R): The equilibrium constant of \mathrm{Cu^{2+}(aq)+S^{2-}(aq)\rightleftharpoons CuS (s)} is high because the solubility product is low.  
Option: 1 (A) is false and (R) is true.
Option: 2 (A) is false and (R) is true.
Option: 3 Both (A) and (R) are false.
Option: 4 Both (A) and (R) are false.
Option: 5 Both (A) and (R) are true but (R) is not the explanation for (A).
Option: 6 Both (A) and (R) are true but (R) is not the explanation for (A).
Option: 7 Both (A) and (R) are true and (R) is the explanation for (A).
Option: 8 Both (A) and (R) are true and (R) is the explanation for (A).

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