For the following Assertion and Reason... | Ionic Equilibrium | JEE Main 2020

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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

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

B

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

C

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

D

Both (A) and (R) are false.

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

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