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Previous year question hub

Ionic Equilibrum - Physical Chemistry - Chemistry Previous Year Questions

Practice Ionic Equilibrum - Physical Chemistry - Chemistry previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

9Papers
5Years
15Questions
1Topics

Ionic Equilibrum question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Ionic Equilibrum. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Not classified 15 100%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

Multiple Choices 15 100%

Subject weightage

Top subjects by unique question coverage.

Chemistry
15 Qs

Most asked topics

Top topics across the included previous year papers.

Physical Chemistry
15 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Ionic Equilibrum
15 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

COMEDK 2025 Morning Shift
3 Qs
COMEDK 2025 AFTERNOON SHIFT
2 Qs
COMEDK 2024 MORNING SHIFT
2 Qs
COMEDK 2024 AFTERNOON SHIFT
1 Qs
COMEDK 2024 EVENING SHIFT
1 Qs
COMEDK 2023 Morning Shift
2 Qs
COMEDK 2023 EVENING SHIFT
1 Qs
COMEDK 2022
1 Qs
COMEDK 2020
2 Qs

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
COMEDK 2025 AFTERNOON SHIFT20252View paper
COMEDK 2025 Morning Shift20253View paper
COMEDK 2024 AFTERNOON SHIFT20241View paper
COMEDK 2024 EVENING SHIFT20241View paper
COMEDK 2024 MORNING SHIFT20242View paper
COMEDK 2023 EVENING SHIFT20231View paper
COMEDK 2023 Morning Shift20232View paper
COMEDK 202220221View paper
COMEDK 202020202View paper

All Ionic Equilibrum previous year questions

Practice every matching question in batches of 20, with every available option.

1
2020 · Chemistry · Physical Chemistry · Ionic Equilibrum
COMEDK 2020

Which of the following salts on being dissolved in water gives pH > 7 at 25\(^\circ\)C ?

A
NH\(_4\)CN
B
NH\(_4\)Cl
C
KNO\(_3\)
D
KCN
Open complete paper
2
2020 · Chemistry · Physical Chemistry · Ionic Equilibrum
COMEDK 2020

Hydroxyl ion concentration of 1M HCl is

A
1 \(\times\) 10\(^{-14}\) mol dm\(^{-3}\)
B
1 \(\times\) 10\(^{-1}\) mol dm\(^{-3}\)
C
1 \(\times\) 10\(^{-13}\) mol dm\(^{-3}\)
D
1 \(\times\) 10\(^{1}\) mol dm\(^{-3}\)
Open complete paper
3
2022 · Chemistry · Physical Chemistry · Ionic Equilibrum
COMEDK 2022

pH of 10\(^{-3}\) M solution of KOH is

A
7.01
B
2
C
11
D
9
Open complete paper
4
2023 · Chemistry · Physical Chemistry · Ionic Equilibrum
COMEDK 2023 EVENING SHIFT

What would be the volume of water required to dissolve \(0.2 \mathrm{~g}\) of \(\mathrm{PbCl}_2\) of molar mass \(278 \mathrm{~g} / \mathrm{mol}\) to prepare a saturated solution of the salt? \((\mathrm{K}_{\mathrm{SP}}\) of \(\mathrm{PbCl}_2=3.2 \times 10^{-8})\)

A
1000 ml
B
359.7 ml
C
278.8 ml
D
360.4 ml
Open complete paper
5
2024 · Chemistry · Physical Chemistry · Ionic Equilibrum
COMEDK 2024 AFTERNOON SHIFT

$$1 \mathrm{~cm}^3 \text { of } 0.01 \mathrm{~M} \mathrm{~HCl} \text { is added to } 1 \mathrm{~L} \text { of } \mathrm{NaCl} \text { solution. The } \mathrm{pH} \text { of the resulting solution is: }$$

A
5
B
3
C
1
D
2
Open complete paper
6
2024 · Chemistry · Physical Chemistry · Ionic Equilibrum
COMEDK 2024 EVENING SHIFT

What volume of \(0.2 \mathrm{~M}\) Acetic acid is to be added to \(100 \mathrm{ml}\) of \(0.4 \mathrm{M}\) Sodium acetate so that a Buffer solution of \(\mathrm{pH}\) equal to 4.94 is obtained? \((\mathrm{pK}_{\mathrm{a}}\) of \(\mathrm{CH}_3 \mathrm{COOH}=4.76)\)

A
132.1 ml
B
125.3 ml
C
150.2 ml
D
110.6 ml
Open complete paper
7
2024 · Chemistry · Physical Chemistry · Ionic Equilibrum
COMEDK 2024 MORNING SHIFT

\(300 \mathrm{ml}\) of an aqueous solution of \(\mathrm{NaOH}\) with \(\mathrm{pH}\) value of 10 is mixed with \(200 \mathrm{ml}\) of an aqueous solution of \(\mathrm{HCl}\) with a \(\mathrm{pH}\) value of 4. What will be the \(\mathrm{pH}\) of the resultant solution at room temperature?

A
11.262
B
10.52
C
9.301
D
8.909
Open complete paper
8
2024 · Chemistry · Physical Chemistry · Ionic Equilibrum
COMEDK 2024 MORNING SHIFT

\(\mathrm{A}_3 \mathrm{~B}_4\) is a sparingly soluble salt with a solubility of \(\mathrm{s} g / \mathrm{L}\). If the Molar mass of \(\mathrm{A}_3 \mathrm{~B}_4\) is \(\mathrm{Mg} / \mathrm{mol}\), what is the expression for its \(\mathrm{K}_{\text {sp }}\) ?

A
\(6912(\mathrm{~s} / \mathrm{M})^7\)
B
\(8413(\mathrm{~s} \mathrm{M})^8\)
C
\(5184(\mathrm{~s} / \mathrm{M})^7\)
D
\(5185(\mathrm{~s} \mathrm{M})^6\)
Open complete paper
9
2025 · Chemistry · Physical Chemistry · Ionic Equilibrum
COMEDK 2025 AFTERNOON SHIFT
The ionisation constant of the weak acid HF whose concentration is 0.1 M is $3.5 \times 10^{-4}$ The Equilibrium constant value for the reaction $\mathrm{F}^{-}+\mathrm{H}_2 \mathrm{O} \leftrightharpoons \mathrm{HF}+\mathrm{OH}^{-}$is _________ and the pH of aqueous solution of the weak acid is __________ .
A
$\mathrm{K}_{\mathrm{eq}}=4.4 \times 10^{-11} \& \mathrm{pH}=4.25$
B
$\mathrm{K}_{\mathrm{eq}}=3.58 \times 10^{-11} \& \mathrm{pH}=4.19$
C
$\mathrm{K}_{\mathrm{eq}}=2.86 \times 10^{-11} \& \mathrm{pH}=3.23$
D
$\mathrm{K}_{\mathrm{eq}}=3.92 \times 10^{-10} \& \mathrm{pH}=4.07$
Open complete paper
10
2025 · Chemistry · Physical Chemistry · Ionic Equilibrum
COMEDK 2025 AFTERNOON SHIFT
Imagine an R - moiety of a pentapeptide molecule having one $-\mathrm{SH},-\mathrm{CONH}_2,-\mathrm{NH}_2$ groups each and two $-$COOH groups in the amino acids forming the pentapeptide. If the pH is maintained at 13.2, what would be the total number of negative charges on the pentapeptide?
A
4
B
2
C
3
D
5
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11
2023 · Chemistry · Physical Chemistry · Ionic Equilibrum
COMEDK 2023 Morning Shift

In a \(0.2 \mathrm{~M}\) aqueous solution, lactic acid is \(6.9 \%\) dissociated. The value of dissociation constant is

A
\(1.2 \times 10^{-4}\)
B
\(9.5 \times 10^{-4}\)
C
\(6.5 \times 10^{-4}\)
D
\(3.6 \times 10^{-2}\)
Open complete paper
12
2023 · Chemistry · Physical Chemistry · Ionic Equilibrum
COMEDK 2023 Morning Shift

A buffer solution has equal volumes of \(0.1 \mathrm{~M} \mathrm{~NH}_4 \mathrm{OH}\) and \(0.01 \mathrm{~M} \mathrm{~NH}_4 \mathrm{Cl}\). The \(\mathrm{pK}_b\) of the base is 5. The \(\mathrm{pH}\) is

A
10
B
9
C
4
D
7
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13
2025 · Chemistry · Physical Chemistry · Ionic Equilibrum
COMEDK 2025 Morning Shift
What volume of $0.2 \mathrm{M} \mathrm{CH}_3 \mathrm{COOH}$ needs to be added to 100 ml of $0.4 \mathrm{M} \mathrm{CH}_3 \mathrm{COONa}$ solution to prepare a buffer of pH equal to 4.91 ? ( $\mathrm{pK}_{\mathrm{a}}$ of $\mathrm{CH}_3 \mathrm{COOH}$ is 4.76 )
A
282.6 ml
B
213.65 ml
C
101.41 ml
D
141.54 ml
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14
2025 · Chemistry · Physical Chemistry · Ionic Equilibrum
COMEDK 2025 Morning Shift
The conductivity of 0.01 M solution of $\mathrm{CH}_3 \mathrm{COOH}$ at 298 K is $1.65 \times 10^{-4} \mathrm{Scm}^{-1}$ What is the $\mathrm{pK}_{\mathrm{a}}$ value of the acid if $\lambda^0\left(\mathrm{H}^{+}\right)$and $\lambda^0\left(\mathrm{CH}_3 \mathrm{COO}\right)^{-1}$ are $349.1 \mathrm{Scm}^2 \mathrm{~mol}^{-1}$ and $40.9 \mathrm{Scm}^2 \mathrm{~mol}^{-1}$ respectively?
A
4.73
B
1.87
C
3.47
D
2.95
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15
2025 · Chemistry · Physical Chemistry · Ionic Equilibrum
COMEDK 2025 Morning Shift
Solubility product of the sparingly soluble salt $\mathrm{AgBrO}_3$ in aqueous medium is $9.3 \times 10^{-10}$ Calculate the mass in gram of $\mathrm{AgBrO}_3$ present in 100 ml of its saturated solution. (Molar mass of $\mathrm{AgBrO}_3$ is $236 \mathrm{~g} / \mathrm{mol}$ )
A
$3.0495 \times 10^{-4}$
B
$4.962 \times 10^{-4}$
C
$6.248 \times 10^{-5}$
D
$7.198 \times 10^{-4}$
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