JEE Main 2020 (Online) 2nd September Morning Slot | Ionic Equilibrium Question 78 | 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

JEE Main 2020 (Online) 8th January Evening Slot

MCQ (Single Correct Answer)

-1

For the following Assertion and Reason, the correct option is :

Assertion : The pH of water increases with increase in temperature.

Reason : The dissociation of water into H⁺ and OH^– is an exothermic reaction.

Both assertion and reason are false.

Both assertion and reason are true, but the reason is not the correct explanation for the assertion.

Both assertion and reason are true, and the reason is the correct explanation for the assertion.

Assertion is not true, but reason is true.

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