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Ionic Equilibrium — JEE Main & Advanced NSEC PYQs

20 previous year questions from Ionic Equilibrium with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

20 questionsNSECSolutions on every page

The pH of a 1.0 10⁻³ ~mol ~L ⁻¹ solution of a weak acid HA is 3.60 . The dissociation constant of the acid is

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The solution with pH value close to 1 is

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The colour changes of an indicator HIn in acid base titrations is given below Which of the following statements is correct?

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Which of the following graphs describes the relationship between [ H ₃ O ⁺ ] and [ OH ⁻ ] in an aqueous solution at a constant temperature?

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If the solubility product of iron(III) hydroxide is 1.8 10⁻³⁷ , the pH of a saturated solution of iron(III) hydroxide in distilled water is close to

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Which of the following statement/s is/are correct about weak acids in aqueous solutions? I. When pH = pKa of a monoprotic acid, 50 % of the acid is ionised II. If pH = pKa ₂ of a d

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Among the following pairs, the one in which both the compounds as pure liquids can show significant auto ionization is

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The percentage dissociation of 0.08 M aqueous acetic acid solution at 25^ C is ( K _ a . of acetic acid at .25^ C =1.8 10⁻⁵ )

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If for an aqueous solution of a weak acid, pH = pK _ a +2 at 25^ C , the approximate fraction of the acid in the dissociated form is

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Aqueous solution of slaked lime, Ca ( OH )₂ , is extensively used in municipal waste water treatment. Maximum pH possible in an aqueous solution of slaked lime is ( K _ sp . of . C

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At 25^ CK _ a of HPO ₄ ²⁻ and HSO ₃ ⁻ are 4.8 10⁻¹³ and 6.3 10⁻⁸ respectively. Which of the following is correct?

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Morphine, a pain killer is basic with the molecular formula C ₁₇ H ₁₉ NO ₃ . The conjugate acid of morphine is

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The volume of one drop of aqueous solution from an eyedropper is approximately 0.05 mL . One such drop of 0.2 M HCl is added to 100 mL of distilled water. The pH of the resulting s

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Which of the following aqueous solution/s will have a pH value between 4.0 and 5.0 at 25^ C ?

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The pOH of the solution obtained by mixing 30 mL of a strong monobasic acid of pH 3.0 and 70 mL of a strong monoacidic base of pH 12.0 at 298 K is

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The pH of the solution produced by complete consumption of 10 mL of 0.4 M NaOH to ' x ' mL of 0.5 MCH ₃ COOH was found to be 4.57. The value of ^ x ^ ( mL ) is ( . Given - K _ a of

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The correct order of concentrations of the ions/molecules present in 1.0 L of 1.0 M H ₂ SO ₄( aq ) solution is

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The correct statements among the following is /are

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In each of the following reactions, role of water is: (i) H ₂ O + HCl H ₃ O ⁺+ Cl ⁻ (ii) 6 H ₂ O + Mg ²⁺ [ Mg ( H ₂ O )₆ ]²⁺ (iii) 2 H ₂ O +2 ~F ₂ 4 HF + O ₂

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Given below is the plot of pH vs volume of NaOH added in an acid-base titration. The correct statement/s among the following is/are:

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