For the following Assertion and Reason... | Ionic Equilibrium

JEE MAIN 2020

02-09-20 S1

Question

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 $\mathrm{Cu}^{2+}(\mathrm{aq})+\mathrm{S}^{2-}(\mathrm{aq}) \rightleftharpoons \mathrm{CuS}(\mathrm{s})$ is high because the solubility product is low.

Select the correct option:

(A) is false and (R) is true.

Both (A) and (R) are true but (R) is not the explanation for (A).

Both (A) and (R) are true and (R) is the explanation for (A).

Both (A) and (R) are false.

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution