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JEE Ionic Equilibrium PYQs with Solutions

391 previous year questions from Ionic Equilibrium (JEE Main & Advanced Chemistry) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

391 questionsChemistry2002–2026Answers + solutions

About Ionic Equilibrium PYQs

Ionic Equilibrium has 391 previous year questions in the Quantrex Academy JEE Main & Advanced Chemistry bank. The 220 questions in this list come from JEE Main (155), NTA Abhyas JEE Main (45) and JEE Advanced (20), spanning 2002 to 2026. Each question opens on its own page with the options, the correct answer and the worked solution where available.

Questions by year (this list)

  • 2026: 14
  • 2025: 17
  • 2024: 9
  • 2023: 17
  • 2022: 17
  • 2021: 17
  • 2020: 57
  • 2019: 11
  • 2018: 10
  • 2017: 3
  • 2015: 1
  • 2014: 3

Ionic Equilibrium questions with solutions

1

Given is a concentrated solution of a weak electrolyte A_xB_y of concentration 'c' and dissociation constant 'K'. The degree of dissociation is given by :

JEE Main 2026 Solution View → 2

M_3 A_2 is a sparingly soluble salt of molar mass y g mol ^ -1 and solubility x g L ^ -1 . The ratio of the molar concentration of the anion ( A^ 3- ) to the solubility product of

JEE Main 2026 Solution View → 3

Arrange the following resultant mixtures in increasing order of their pH values A. 10 mL 0.2 M Ca(OH) _2 + 25 mL 0.1 M HCl B. 10 mL 0.01 M H _2 SO _4 + 10 mL 0.01 M Ca(OH) _2 C.

JEE Main 2026 Solution View → 4

20 mL of a solution of acetic acid required 28.4 mL of 0.1 M NaOH for its neutralization. A solution (X) was prepared by mixing 20 mL of the above acetic acid and 14.2 mL of 0.1 M

JEE Main 2026 Solution View → 5

The pH of a solution obtained by mixing 5 mL of 0.1 M NH_4OH solution with 250 mL of 0.1 M NH_4Cl solution is _____ × 10^ -2 . (Nearest integer) Given: pK_b(NH_4OH) = 4.74 2 =

JEE Main 2026 Solution View → 6

The first and second ionization constants of a weak dibasic acid H_2 A are 8.1 × 10^ -8 and 1.0 × 10^ -13 respectively. 0.1 mol of H_2 A was dissolved in 1 L of 0.1 M HCl

JEE Main 2026 Solution View → 7

At 25°C , 20.0 mL of 0.2 M weak monoprotic acid HX is titrated against 0.2 M NaOH. The pH of the solution (a) at the start of the titration (when NaOH has not been added) and (b)

JEE Main 2026 Solution View → 8

The solubility product constants of Ag_2CrO_4 and AgBr are 32x and 4y respectively at 298 K. The value of ( molarity of Ag_2CrO_4 molarity of AgBr ) can be expressed as :

JEE Main 2026 Solution View → 9

Consider a weak base ' B ' of pK_ b =5.699 . ' x ' mL of 0.02 M HCl and ' y ' mL of 0.02 M weak base ' B ' are mixed to make 100 mL of a buffer of pH 9 at 25^ ∘ C . The values of

JEE Main 2026 Solution View → 10

Consider the dissociation equilibrium of the following weak acid HA leftharpoons H^ + (aq)+A^ - (aq) If the pKa of the acid is 4, then the pH of 10 mMHA solution is \_\_\_\_

JEE Main 2026 Solution View → 11

Consider two Group IV metal ions X^ 2+ and Y^ 2+ . A solution containing 0.01 M X^ 2+ and 0.01 M Y^ 2+ is saturated with H_ 2 ~S . The pH at which the metal sulphide YS will form

JEE Main 2026 Solution View → 12

x mg of pure HCl was used to make an aqueous solution. 25.0 mL of 0.1 M Ba(OH)_ 2 solution is used when the HCl solution was titrated against it. The numerical value of x is

JEE Main 2026 Solution View → 13

Which of the following mixture gives a buffer solution with pH=9.25 ? Given : pK_ b (NH_ 4 OH)=4.75

JEE Main 2026 Solution View → 14

The first and second ionization constants of H_ 2 X are 2.5 × 10^ -8 and 1.0 × 10^ -13 respectively. The concentration of X^ 2- in 0.1 M H_ 2 X solution is \_\_\_\_ × 10^ -15 M .

JEE Main 2026 Solution View → 15

At 25^ ∘ C , the concentration of H^ + ions in 1.00 × 10^ -3 M aqueous solution of a weak monobasic acid having acid dissociation constant (K_a)=4.00 × 10^ -11 is X × 10^ -7 M .

JEE Advanced 2025 Solution View → 16

The solubility of barium iodate in an aqueous solution prepared by mixing 200 mL of 0.010 M barium nitrate with 100 mL of 0.10 M sodium iodate is X × 10^ -6 ~mol dm^ -3 . The

JEE Advanced 2025 Solution View → 17

The equilibrium constant for decomposition of H_2 O(g) H_2 O(~g) leftharpoons H_2(~g)+(1)/(2) O_2(~g)(Δ G^ ∘ =92.34 ~kJ ~mol^ -1 ) is 8.0 × 10^ -3 at 2300 K and total pressure at

JEE Main 2025 Solution View → 18

Only litre buffer solution was prepared by adding 0.10 mol each of NH_3 and NH_4 Cl in deionised water. The change in pH on addition of 0.05 mol of HCl to the above solution is

JEE Main 2025 Solution View → 19

An aqueous solution of HCl with pH 1.0 is diluted by adding equal volume of water (ignoring dissociation of water). The pH of HCl solution would (Given 2=0.30)

JEE Main 2025 Solution View → 20

x mg of Mg(OH)_2( molar mass =58) is required to be dissolved in 1.0 L of water to produce a pH of 10.0 at 298 K. The value of x is ________ mg. (Nearest integer) (Given

JEE Main 2025 Solution View → 21

The pH of a 0.01 M weak acid HX(K_ a =4 × 10^ -10 ) is found to be 5. Now the acid solution is diluted with excess of water so that the pH of the solution changes to 6. The new

JEE Main 2025 Solution View → 22

10 mL of 2 M NaOH solution is added to 20 mL of 1 M HCl solution kept in a beaker. Now, 10 mL of this mixture is poured into a volumetric flask of 100 mL containing 2 moles of HCl

JEE Main 2025 Solution View → 23

If equal volumes of \(AB_2\) and XY (both are salts) aqueous solutions are mixed, which of the following combination will give a precipitate of \(AY_2\) at 300 K ? (Given \(K_ sp

JEE Main 2025 Solution View → 24

Total number of non bonded electrons present in NO_2 ^ - ion based on Lewis theory is

JEE Main 2025 Solution View → 25

Arrange the following in increasing order of solubility product : Ca(OH)_2, AgBr, PbS, HgS

JEE Main 2025 Solution View → 26

A weak acid HA has degree of dissociation x . Which option gives the correct expression of ( pH pK_ a )?

JEE Main 2025 Solution View → 27

K_ sp for Cr(OH)_3 is 1.6 × 10^ -30 . What is the molar solubility of this salt in water?

JEE Main 2025 Solution View → 28

pH of water is 7 at 25^ ∘ C . If water is heated to 80^ ∘ C ., it's pH will :

JEE Main 2025 Solution View → 29

Which of the following happens when NH_4 OH is added gradually to the solution containing 1 M A^ 2+ and 1 MB^ 3+ ions? Given : K_ sp [A(OH)_2]=9 × 10^ -10 and K_ sp [B(OH)_3]=27 ×

JEE Main 2025 Solution View → 30

If 1 mM solution of ethylamine produces pH=9 , then the ionization constant (K_ b ) of ethylamine is 10^ -x . The value of x is ______ (nearest integer). [The degree of ionization

JEE Main 2025 Solution View → 31

The molar solubility(s) of zirconium phosphate with molecular formula (Zr^ 4+ )_3(PO_4^ 3- )_4 is given by relation :

JEE Main 2025 Solution View → 32

For a sparingly soluble salt \(AB_2\), the equilibrium concentrations of \(A^ 2+ \) ions and \(B^ - \)ions are \(1.2 × 10^ -4 M\) and \(0.24 × 10^ -3 M\), respectively. The

JEE Main 2024 Solution View → 33

Given below are two statements : Statement (I) : A Buffer solution is the mixture of a salt and an acid or a base mixed in any particular quantities. Statement (II) : Blood is

JEE Main 2024 Solution View → 34

Given below are two statements : Statement I : On passing \(HCl_ (g) \) through a saturated solution of \(BaCl_2\), at room temperature white turbidity appears. Statement II

JEE Main 2024 Solution View → 35

Solubility of calcium phosphate (molecular mass, M ) in water is W _ g per 100mL at 25 ° C . Its solubility product at 25 ° C will be approximately.

JEE Main 2024 Solution View → 36

K _ a for CH _ 3 COOH is 1 . 8 × 10 ^ - 5 and K _ b for NH _ 4 OH is 1 . 8 × 10 ^ - 5 . The pH of ammonium acetate solution will be

JEE Main 2024 Solution View → 37

The pH of an aqueous solution containing 1M benzoic acid ( pK _ a = 4 . 20) and 1M sodium benzoate is 4 . 5 . The volume of benzoic acid solution in 300mL of this buffer solution

JEE Main 2024 Solution View → 38

The pH at which Mg ( OH ) _ 2 [ K _ sp = 1 × 10 ^ - 11 ] begins to precipitate from a solution containing 0 . 10M Mg ^ 2 + ions is ______.

JEE Main 2024 Solution View → 39

Which of the following is strongest Bronsted base?

JEE Main 2024 Solution View → 40

Given below are two statements : Statement (I) : Aqueous solution of ammonium carbonate is basic. Statement (II) : Acidic/basic nature of salt solution of a salt of weak acid and

JEE Main 2024 Solution View → 41

On decreasing the pH from 7 to 2 , the solubility of a sparingly soluble salt ( MX ) of a weak acid ( HX ) increased from 10 ^ - 4 mol L ^ - 1 to 10 ^ - 3 mol L ^ - 1 . The pK _ a

JEE Advanced 2023 Solution View → 42

Which of the following statement(s) is/are correct? (A) The pH of 1 × 10 ^ – 8 MHCl solution is 8 . (B) The conjugate base of H _ 2 PO ^ 4 - is HPO _ 4 ^ 2 - . (C) K _ w increases

JEE Main 2023 Solution View → 43

20mL of 0 . 1MNaOH is added to 50mL of 0 . 1M acetic acid solution. The pH of the resulting solution is × 10 ^ - 2 . (Nearest integer) Given : pKa( CH _ 3 COOH) = 4 . 76 log2 = 0

JEE Main 2023 Solution View → 44

25 . 0mL of 0 . 050MBa ( NO _ 3 ) _ 2 is mixed with 25 . 0mL of 0 . 020MNaF . K _ sp of BaF _ 2 is 0 . 5 × 10 – 6 at 298K . The ratio of [ Ba ^ 2 + ] [ F ^ - ] ^ 2 and K _ sp is

JEE Main 2023 Solution View → 45

An analyst wants to convert 1LHCl of pH = 1 to a solution of HCl of pH = 2 . The volume of water needed to do this dilution is _____ mL . (Nearest integer)

JEE Main 2023 Solution View → 46

Given below are two statements: Statement-I : Methyl orange is a weak acid. Statement-II : The benzenoid form of methyl orange is more intense/deeply coloured than the quinonoid

JEE Main 2023 Solution View → 47

The solubility product of BaSO _ 4 is 1 × 10 ^ - 10 at 298K . The solubility of BaSO _ 4 in 0 . 1M K _ 2 SO _ 4 ( aq ) solution is ------ × 10 ^ - 9 g L ^ - 1 (nearest integer).

JEE Main 2023 Solution View → 48

The titration curve of weak acid vs. strong base with phenolphthalein as indicator is shown below. The K _ phenolphthalein = 4 × 10 ^ - 10 Given: log2 = 0 . 3 The number of

JEE Main 2023 Solution View → 49

Incorrect statement for the use of indicator in acid-base titration is:

JEE Main 2023 Solution View → 50

At 298K , the solubility of silver chloride in water is 1 . 434 × 10 ^ - 3 g L ^ - 1 . The value of - logK _ sp for silver chloride is (Given mass of Ag is 107 . 9g mol ^ - 1

JEE Main 2023 Solution View → 51

600mL of 0 . 01MHCl is mixed with 400mL of 0 . 01M H _ 2 SO _ 4 . The pH of the mixture is _____ × 10 ^ - 2 . (Nearest integer) [Given log2 = 0 . 30, log3 = 0 . 48, log5 = 0 . 69

JEE Main 2023 Solution View → 52

The volume of HCl , containing 73g L ^ - 1 , required to completely neutralise NaOH obtained by reacting 0 . 69g of metallic sodium with water, is _____ mL . (Nearest Integer)

JEE Main 2023 Solution View → 53

Millimoles of calcium hydroxyide required to produce 100mL of the aqueous solution of pH12 is x × 10 ^ - 1 . The value of x is _____ (Nearest integer). Assume complete

JEE Main 2023 Solution View → 54

When the hydrogen ion concentration [ H ^ + ] changes by a factor of 1000 , the value of pH of the solution

JEE Main 2023 Solution View → 55

A litre of buffer solution contains 0 . 1 mole of each of NH _ 3 and NH _ 4 Cl . On the addition of 0 . 02 mole of HCl by dissolving gaseous HCl , the pH of the solution is found

JEE Main 2023 Solution View → 56

If the pKa of lactic acid is 5 , then the pH of 0 . 005M calcium lactate solution at 25 ° C is __________ × 10 ^ – 1 (Nearest integer)

JEE Main 2023 Solution View → 57

The dissociation constant of acetic is x × 10 ^ – 5 . When 25mLof0 . 2M CH _ 3 COONa solution is mixed with 25mLof0 . 02M CH _ 3 COOH solution, the pH of the resultant solution is

JEE Main 2023 Solution View → 58

Concentration of H _ 2 SO _ 4 and Na _ 2 SO _ 4 in a solution is 1M and 1 . 8 × 10 ^ - 2 M , respectively. Molar solubility of PbSO _ 4 in the same solution is X × 10 ^ - Y M

JEE Advanced 2022 Solution View → 59

A solution is prepared by mixing 0 . 01mol each of H _ 2 CO _ 3 , NaHCO _ 3 , Na _ 2 CO _ 3 , and NaOH in 100 ~mL of water. pH of the resulting solution is [Given: pK _ a _ 1 and

JEE Advanced 2022 Solution View → 60

200mL of 0 . 01MHCl is mixed with 400mL of 0 . 01 MH _ 2 SO _ 4 . The pH of the mixture is

JEE Main 2022 Solution View → 61

If the solubility product of PbS is 8 × 10 ^ - 28 , then the solubility of PbS in pure water at 298K is x × 10 ^ - 16 mol L ^ - 1 . The value of x is____ (Nearest integer) [Given

JEE Main 2022 Solution View → 62

K _ a for butyric acid ( C _ 3 H _ 7 COOH) is 2 × 10 ^ - 5 . The pH of 0 . 2M solution of butyric acid is____ × 10 ^ - 1 . (Nearest integer) [Given log2 = 0 . 30 ]

JEE Main 2022 Solution View → 63

The Plot of pH -metric titration of weak base NH _ 4 OH vs strong acid HCl looks like

JEE Main 2022 Solution View → 64

At 310K , the solubility of CaF _ 2 in water is 2 . 34 × 10 ^ - 3 g / 100mL . The solubility product of CaF _ 2 is ---- × 10 ^ - 8 (mol / L) ^ 3 (nearest integer). (Given molar

JEE Main 2022 Solution View → 65

Class XII students were asked to prepare one litre of buffer solution of pH8 . 26 by their chemistry teacher. The amount of ammonium chloride to be dissolved by the student in 0 .

JEE Main 2022 Solution View → 66

Ka _ 1 , Ka _ 2 and Ka _ 3 are the respective ionization constants for the following reactions (a), (b) and (c). (a) H _ 2 C _ 2 O _ 4 ⇌ H ^ + + HC _ 2 O _ 4 ^ - (b) HC _ 2 O _ 4

JEE Main 2022 Solution View → 67

In base vs. Acid titration, at the end point methyl orange is present as

JEE Main 2022 Solution View → 68

20mL of 0 . 1M NH _ 4 OH is mixed with 40mL of 0 . 05MHCl . The pH of the mixture is nearest to: (Given: K _ b ( NH _ 4 OH) = 1 × 10 ^ - 5 , log2 = 0 . 30 , log3 = 0 . 48, log5 =

JEE Main 2022 Solution View → 69

The solubility of AgCl will be maximum in which of the following?

JEE Main 2022 Solution View → 70

A student needs to prepare a buffer solution of propanoic acid and its sodium salt with pH4 . The ratio of [ CH _ 3 CH _ 2 COO ^ - ] [ CH _ 3 CH _ 2 COOH] required to make buffer

JEE Main 2022 Solution View → 71

p ^ H value of 0 . 001MNaOH solution is

JEE Main 2022 Solution View → 72

50mL of 0 . 1M CH _ 3 COOH is being titrated against 0 . 1MNaOH . When 25mL of NaOH has been added, the pH of the solution will be____ × 10 ^ - 2 . (Nearest integer) (Given : pK _

JEE Main 2022 Solution View → 73

The K _ sp for bismuth sulphide ( Bi _ 2 S _ 3 ) is 1 . 08 × 10 ^ - 73 . The solubility of Bi _ 2 S _ 3 in molL ^ - 1 at 298K is

JEE Main 2022 Solution View → 74

Assertion: The amphoteric behaviour of water is explained by Lewis acid base theory Reason: water acts as acid with NH _ 3 and base with H _ 2 S

JEE Main 2022 Solution View → 75

The molar solubility of Zn ( OH ) _ 2 in 0 . 1MNaOH solution is x × 10 ^ - 18 M . The value of x is _____ . (Nearest integer) (Given : The solubility product ofZn ( OH ) _ 2 is2 ×

JEE Main 2021 Solution View → 76

The pH of a solution obtained by mixing 50mL of 1MHCl and 30mL of 1MNaOH is x × 10 ^ - 4 . The value of x is (Nearest integer) [log2 . 5 = 0 . 3979]

JEE Main 2021 Solution View → 77

A _ 3 B _ 2 is a sparingly soluble salt of molar mass M(g mol ^ - 1 ) and solubility xg L ^ - 1 . The solubility product satisfies K _ sp = a ((x)/(M)) ^ 5 . The value of a is

JEE Main 2021 Solution View → 78

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

JEE Main 2021 Solution View → 79

Assuming that Ba ( OH ) _ 2 is completely ionised in aqueous solution under the given conditions the concentration of H _ 3 O ^ + ions in 0 . 005M aqueous solution of Ba ( OH ) _

JEE Main 2021 Solution View → 80

A solution is 0 . 1M in Cl ^ - and 0 . 001M in CrO _ 4 ^ 2 - . Solid AgNO _ 3 is gradually added to it Assuming that the addition does not change in volume and K _ sp ( AgCl ) = 1

JEE Main 2021 Solution View → 81

The solubility of CdSO _ 4 in water is 8 . 0 × 10 ^ - 4 mol L ^ - 1 . Its solubility in 0 . 01M H _ 2 SO _ 4 solution is ___ × 10 ^ - 6 mol L ^ - 1 (Round off to the Nearest

JEE Main 2021 Solution View → 82

10 . 0ml of Na _ 2 CO _ 3 solution is titrated against 0 . 2MHCl solution. The following values were obtained in 5 readings. 4 . 8ml, 4 . 9ml, 5 . 0ml, 5 . 0ml and 5 . 0ml Based

JEE Main 2021 Solution View → 83

In order to prepare a buffer solution of pH5 . 74 , sodium acetate is added to acetic acid. If the concentration of acetic acid in the buffer is 1 . 0M, the concentration of

JEE Main 2021 Solution View → 84

Which of the following compound CANNOT act as a Lewis base?

JEE Main 2021 Solution View → 85

0 . 01 moles of a weak acid HA( K _ a = 2 . 0 × 10 ^ - 6 ) is dissolved in 1 . 0L of 0 . 1MHCl solution. The degree of dissociation of HA is __________ × 10 ^ - 5 (Round off to

JEE Main 2021 Solution View → 86

Sulphurous acid ( H _ 2 SO _ 3 ) has Ka _ 1 = 1 . 7 × 10 ^ - 2 and Ka _ 2 = 6 . 4 × 10 ^ - 8 . The pH of 0 . 588M H _ 2 SO _ 3 is____________ ( Round off to the Nearest Integer ) .

JEE Main 2021 Solution View → 87

Two salts A _ 2 X and MX have the same value of solubility product of 4 . 0 × 10 ^ - 12 . The ratio of their molar solubilizes i.e. S( A _ 2 X) S ( MX ) = ________. (Round off to

JEE Main 2021 Solution View → 88

The pH of ammonium phosphate solution, if pk _ a of phosphoric acid and pk _ b of ammonium hydroxide are 5 . 23 and 4 . 75 respectively, is

JEE Main 2021 Solution View → 89

The solubility of Ca (OH) _ 2 in water is : [Given : The solubility product of Ca (OH) _ 2 in water = 5 . 5 × 10 ^ - 6 ]

JEE Main 2021 Solution View → 90

The solubility of AgCN in a buffer solution of pH = 3 is x . The value of x is: [Assume : No cyano complex is formed ; K _ sp (AgCN) = 2 . 2 × 10 ^ - 16 and K _ a (HCN) = 6 . 2 ×

JEE Main 2021 Solution View → 91

The solubility product of PbI _ 2 is 8 . 0 × 10 ^ - 9 . The solubility of lead iodide in 0 . 1 molar solution of lead nitrate is x × 10 ^ - 6 mol / L . The value of x is _________

JEE Main 2021 Solution View → 92

A solution of 0 . 1M weak base ( B ) is titrated with 0 . 1M of a strong acid ( HA ) . The variation of pH of the solution with the volume of HA added is shown in the figure

JEE Advanced 2020 Solution View → 93

An acidified solution of 0 . 05M Zn ^ 2 + is saturated with 0 . 1M H _ 2 S . What is the minimum molar concentration ( M ) of H ^ + required to prevent the precipitation of ZnS ?

JEE Advanced 2020 Solution View → 94

If the solubility product of AB _ 2 is 3 . 20 × 10 ^ - 11 M ^ 3 , then the solubility of AB _ 2 in pure water is _______ × 10 ^ - 4 mol L ^ - 1 [Assuming that neither kind of ion

JEE Main 2020 Solution View → 95

Arrange the following solutions in the decreasing order of pOH : (A) 0 . 01MHCl (B) 0 . 01MNaOH (C) 0 . 01 MCH _ 3 COONa (D) 0 . 01MNaCl

JEE Main 2020 Solution View → 96

A soft drink was bottled with a partial pressure of CO _ 2 of 3 bar over the liquid at room temperature. The partial pressure of CO _ 2 over the solution approaches a value of 30

JEE Main 2020 Solution View → 97

An acidic buffer is obtained on mixing:

JEE Main 2020 Solution View → 98

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

JEE Main 2020 Solution View → 99

The K _ sp for the following dissociation is 1.6 × 10 ^ - 5 PbCl _ 2(s) ⇌ P b _ (aq) ^ 2 + + 2C l _ (aq) ^ - Which of the following choices is correct for a mixture of

JEE Main 2020 Solution View → 100

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

JEE Main 2020 Solution View → 101

The stoichiometry and solubility product of a salt with the solubility curve given below is, respectively:

JEE Main 2020 Solution View → 102

3g of acetic acid is added to 250mL of 0.1MHCl and the solution made up to 500mL . To 20mL of this solution (1)/(2)mL of 5MNaOH is added. The pH of the solution is ________

JEE Main 2020 Solution View → 103

Two solutions, A and B, each of 100L was made by dissolving 4g of NaOH and 9.8g of H _ 2 S O _ 4 in water, respectively. The pH of the resultant solution obtained from mixing 40L

JEE Main 2020 Solution View → 104

In an aqueous solution, the ionization constants for carbonic acid are K _ 1 = 4.2 × 1 0 ^ - 7 and K _ 2 = 4.8 × 1 0 ^ - 11 Select the correct statement for a saturated 0.034 M

NTA Abhyas JEE Main 2020 Solution View → 105

At 25 ^ o C,pH range of phenolphthalein is 8 - 10. At 100 ^ o C, pH range of phenolphthalein would be -

NTA Abhyas JEE Main 2020 Solution View → 106

The equilibrium constant for : CN ^ - + CH _ 3 COOH ⇌ HCN + CH _ 3 COO ^ - is : ( Given pK _ b for CN ^ - = 4.69and pK _ b for CH _ 3 COO ^ - = 2.25 )

NTA Abhyas JEE Main 2020 Solution View → 107

Bromine in excess is dropped to a 0.01M SO _ 2 . All of SO _ 2 is oxidized to H _ 2 SO _ 4 and the excess Br _ 2 ~is removed by flushing with gaseous N _ 2 . Determine the pH of

NTA Abhyas JEE Main 2020 Solution View → 108

The K _ sp of FeS = 4 × 10 ^ - 19 at 298K. The minimum concentration of H^ + ions required to prevent the precipitation of FeS from a 0.01M solution Fe^ 2 + salt by passing H _ 2

NTA Abhyas JEE Main 2020 Solution View → 109

K_ a for HCN is 5 x 10^ - 10 at 25^ o C. For maintaining a constant pH of 9, the volume of 5 M KCN solution required to be added to 10 mL of 2 M HCN solution is:

NTA Abhyas JEE Main 2020 Solution View → 110

Minimum moles of NH _ 3 required to be added to 1L solution so as to dissolve 0 .1 mol of AgCl( K _ sp = 1 .0 × 10 ^ - 10 ) by the reaction is: cases AgCl(s) & + & 2 NH _ 3 & & ⇌

NTA Abhyas JEE Main 2020 Solution View → 111

For the indicator, HIn; the ratio& [ In ^ - ] [HIn] is 7 .0 at pH of 4 .3 . K _ In for the indicator is [ Given: log7 = 0 .845 and Antilog ( - 3.455 ) = 3.5 × 10 ^ - 4 ]

NTA Abhyas JEE Main 2020 Solution View → 112

If the pK_ a of acetic acid and pK_ b of NH_ 4 OH are 4.76 and 4.75 respectively, what will be the pH of ammonium acetate solution?

NTA Abhyas JEE Main 2020 Solution View → 113

What is [H^ + ] in a solution that is 0.01M in HCN and 0.02M in NaCN? br /> ( K _ a for HCN = 6.2 × 1 0 ^ - 10 )

NTA Abhyas JEE Main 2020 Solution View → 114

If the concentration of [ N H _ 4 ^ + ] in a solution having 0.02MN H _ 3 and 0.005MCa (OH) _ 2 is a × 10 ^ - 6 M , determine a . [ k _ b (N H _ 3 ) = 1.8 × 10 ^ - 5 ]

NTA Abhyas JEE Main 2020 Solution View → 115

What is the [ OH ^ − ] concentration of a 0.04M solution of CH_ 3 COONa? [K _ a of CH_ 3 COONa=2× 10 ^ - 5 ,log 2=0.30,log 5=0.69, 10 ^ 0.7 ≅ 5]

NTA Abhyas JEE Main 2020 Solution View → 116

Calculate dissociation constant for an acid HA having [ H^ + ] equals to 0.1M (Given: degree of dissociation of HA is 1% )

NTA Abhyas JEE Main 2020 Solution View → 117

The Solubility of A B _ 2 is 0.05g per 100mL at 25^ o C. Calculate K _ sp of A B _ 2 at 25^ o C? [Atomic mass of A=20amu, atomic mass of B=40amu ]

NTA Abhyas JEE Main 2020 Solution View → 118

One litre of 1M solution of an acid HA ( K _ a = 10 ^ - 4 at 25 ^ o C) has pH=2. It is diluted by water so the new pH becomes double. The solution was diluted to y × 1 0 ^ z ml .

NTA Abhyas JEE Main 2020 Solution View → 119

When 0.01 moles of the following acids are dissolved in 1L of H _ 2 O , the [ H^ + ] will be greatest in: -

NTA Abhyas JEE Main 2020 Solution View → 120

pH of a 1000cc solution is 2. It will not change if

NTA Abhyas JEE Main 2020 Solution View →
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Related JEE Chemistry chapters

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Ionic Equilibrium in other exams

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