JEE Main 2020 (Online) 3rd September Morning Slot | Ionic Equilibrium Question 77 | Chemistry

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
Cu²⁺(aq) + S^2–(aq) ⇌ CuS(s) is high because the solubility product is low.

(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.

JEE Main 2020 (Online) 9th January Evening Slot

MCQ (Single Correct Answer)

-1

The solubility product of Cr(OH)₃ at 298 K is 6.0 × 10^–31. The concentration of hydroxide ions in a saturated solution of Cr(OH)₃ will be :

(2.22 × 10^–31)^1/4

(4.86 × 10^–29)^1/4

(18 × 10^–31)^1/4

(18 × 10^–31)^1/2

JEE Main 2020 (Online) 9th January Morning Slot

MCQ (Single Correct Answer)

-1

The K_sp for the following dissociation is 1.6 × 10^–5

$$PbC{l_{2(s)}} \leftrightharpoons Pb_{(aq)}^{2 + } + 2Cl_{(aq)}^ - $$

Which of the following choices is correct for a mixture of 300 mL 0.134 M Pb(NO₃)₂ and 100 mL 0.4 M NaCl ?

Q > K_sp

Not enough data provided

Q < K_sp

Q = K_sp

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