List of top Chemistry Questions on Ionic Equilibrium In Solution asked in JEE Main

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. 
Assertion A : \(LiF\) is sparingly soluble in water.
Reason R : The ionic radius of \(Li^+\) ion is smallest among its group members, hence has least hydration enthalpy.
In the light of the above statements, choose the most appropriate answer from the options given below.

Ka₁, Ka₂ and Ka₃ are the respective ionization constants for the following reactions (a),(b), and (c).
(a) H₂C₂O₄⇌H⁺+HC₂O₄⁻
(b) HC₂O₄⁻⇌H⁺+HC₂O₄²⁻
(c) H₂C₂O₄⇌2H⁺+_C2O₄²⁻
The relationship between Ka₁,Ka₂ and Ka₃ is given as

The correct order of increasing ionic radii is

Ionic radii of cation A⁺ and anion B^– are 102 and 181 pm, respectively. These ions are allowed to crystallize into an ionic solid. This crystal has cubic close packing for B^–. A⁺ is present in all octahedral voids. The edge length of the unit cell of the crystal AB is _____pm. (Nearest integer)

Given below are two statements :
Statement I : In the titration between strong acid and weak base methyl orange is suitable as an indicator.
Statement II : For titration of acetic acid with NaOH phenolphthalein is not a suitable indicator.
In the light of the above statements, choose the most appropriate answer from the options given below :

The \(OH^-\) concentration in a mixture of 5.0 mL of 0.0504 M \(NH_4Cl\) and 2 mL of 0.0210 M \(NH_3\) solution is \(x \times 10^{-6}\) M. The value of \(x\) is _________. (Nearest integer)
[Given \(K_w = 1 \times 10^{-14}\) and \(K_b = 1.8 \times 10^{-5}\)]

The pH of a solution obtained by mixing 50 mL of 1 M HCl and 30 mL of 1 M NaOH is $x \times 10^{-1}$. The value of $x$ is ________. (Nearest integer) [log 2.5 = 0.3979]

The solubility of CdSO₄ in water is 8.0 × 10^{-4} mol L^{-1}. Its solubility in 0.01 M H₂SO₄ solution is ________ × 10^{-6} mol L^{-1}. (Round off to the Nearest Integer). (Assume that solubility is much less than 0.01 M)

In order to prepare a buffer solution of pH 5.74, sodium acetate is added to acetic acid. If the concentration of acetic acid in the buffer is 1.0 M, the concentration of sodium acetate in the buffer is __________ M. (Round off to the Nearest Integer). [Given : pKa (acetic acid) = 4.74]

Which of the following is the correct order of first ionization enthalpy?