Q JEE MAIN 2026

Consider the dissociation equilibrium of the following weak acid $\mathrm{HA} \boxtimes \mathrm{H}^{+}(\mathrm{aq})+\mathrm{A}^{-}(\mathrm{aq})$ If the pKa of the acid is 4...

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Q JEE MAIN 2026

Consider two Group IV metal ions $\mathrm{X}^{2+}$ and $\mathrm{Y}^{2+}$. A solution containing $0.01 \mathrm{MX}^{2+}$ and $0.01 \mathrm{MY}^{2+}$ is saturated with...

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Q JEE MAIN 2026

The first and second ionization constants of $\mathrm{H}_2 \mathrm{X}$ are $2.5 \times 10^{-8}$ and $1.0 \times 10^{-13}$ respectively. The concentration...

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Q JEE MAIN 2026

Which of the following mixture gives a buffer solution with $\mathrm{pH}=9.25$ ? Given: $\mathrm{pK}_{\mathrm{b}}\left(\mathrm{NH}_4 \mathrm{OH}\right)=4.75$

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Q JEE MAIN 2019

What is the molar solubility of $\mathrm{Al}(\mathrm{OH})_3$ in 0.2 M NaOH solution? Given that, solubility product of $\mathrm{Al}(\mathrm{OH})_3=2.4 \times 10^{-2}$

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Q JEE MAIN 2020

For the following Assertion and Reason, the correct option is Assertion (A): When Cu (II) and sulphide ions are mixed,...

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Q JEE MAIN 2019

The molar solubility of $\mathrm{Cd}(\mathrm{OH})_2$ is $1.84 \times 10^{-5} \mathrm{M}$ in water. The expected solubility of $\mathrm{Cd}(\mathrm{OH})_2$ in a buffer...

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Q JEE MAIN_2019_

Consider the following statements (a) The pH of a mixture containing 400 mL of 0.1 $\mathrm{M} \mathrm{H}_2 \mathrm{SO}_4$ and 400...

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Q JEE MAIN 2020

A soft drink was bottled with a partial pressure of $\mathrm{CO}_2$ of 3 bar over the liquid at room temperature....

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Q JEE MAIN 2020

If the solubility product of $\mathrm{AB}_2$ is $3.20 \times 10^{-11} \mathrm{M}^3$, then the solubility of $A B_2$ in pure water...

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Q JEE MAIN 2020

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

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Q JEE Main 2019

A mixture of 100 m mol of $\mathrm{Ca}(\mathrm{OH})_2$ and 2 g of sodium sulphate was dissolved in water and the...

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Q JEE MAIN 2019

The pH of a $0.02 \mathrm{M} \mathrm{NH}_4 \mathrm{Cl}$ solution will be [given $$ \left.\mathrm{K}_{\mathrm{b}}\left(\mathrm{NH}_4 \mathrm{OH}\right)=10^{-5} \text { and } \log...

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Q JEE MAIN 2020

The solubility product of $\mathrm{Cr}(\mathrm{OH})_3$ at 298 K is $6.0 \times 10^{-31}$. The concentration of hydroxide ions in a saturated...

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Q JEE-MAIN 2020

The volume (in mL) of 0.1 N NaOH required to neutralise 10 mL of 0.1 N phosphinic acid is ____.

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Q JEE-MAIN 2020

100 mL of 0.1 M HCl is taken in a beaker and to it 100 mL of 0.1 M NaOH...

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Q JEE MAIN 2020

For the following Assertion and Reason, the correct option is Assertion : The pH of water increases with increase in...

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Q JEE MAIN 2019

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Q JEE MAIN 2021

The pH of a solution obtained by mixing 50 mL of 1 M HCl and 30 mL of 1 M...

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Q JEE MAIN 2021

The $\mathrm{OH}^{-}$concentration in a mixture of 5.0 mL of $0.0504 \mathrm{M} \mathrm{NH}_4 \mathrm{Cl}$ and 2 mL of $0.0210 \mathrm{MNH}_3$ solution...

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Q JEE MAIN 2021

Given below are two statements. Statement I: In the titration between strong acid and weak base methyl orange is suitable...

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Q JEE MAIN 2021`

The molar solubility of $\mathrm{Zn}(\mathrm{OH})_2$ in 0.1 M NaOH solution is $x \times 10^{-18} \mathrm{M}$. The value of $x$ is...

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Q JEE-MAIN 2021

The molar solubility of $\mathrm{Zn}(\mathrm{OH})_2$ in 0.1 M NaOH solution is $x \times 10^{-18} \mathrm{M}$. The value of $x$ is...

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Q JEE MAIN 2021

$\mathrm{A}_3 \mathrm{~B}_2$ is a sparingly soluble salt of molar mass $\mathrm{M}\left(\mathrm{g} \mathrm{mol}^{-1}\right)$ and solubility $\times \mathrm{g} \mathrm{L}^{-1}$. The solubility product...

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Q JEE MAIN 2019

If solubility product of $\mathrm{Zr}_3\left(\mathrm{PO}_4\right)_4$ is denoted by $\mathrm{K}_{\mathrm{sp}}$ and its molar solubility is denoted by S , then which...

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Q JEE MAIN 2021

Assuming that $\mathrm{Ba}(\mathrm{OH})_2$ is completely ionised in aqueous solution under the given conditions the concentration of $\mathrm{H}_3 \mathrm{O}^{+}$ions in 0.005...

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Q JEE MAIN 2021

A solution is 0.1 M in $\mathrm{Cl}^{-}$and 0.001 M in $\mathrm{CrO}_4^{-2}$. Solid $\mathrm{AgNO}_3$ is gradually added to it Assuming that...

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Q JEE MAIN 2021

The solubility of $\mathrm{CdSO}_4$ in water is $8.0 \times 10^{-4} \mathrm{~mol} \mathrm{L}^{-1}$. Its solubility in $0.01 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4$ solution...

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Q JEE-Main-2021

0.01 moles of a weak acid HA $\left(K_a=2.0 \times 10^{-6}\right)$ is dissolved in 1.0 L of 0.1 M HCl solution....

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Q JEE MAIN 2021

Sulphurous acid $\left(\mathrm{H}_2 \mathrm{SO}_3\right)$ has $\mathrm{Ka}_1=1.7 \times 10^{-2}$ and $\mathrm{Ka}_2=6.4 \times 10^{-8}$. The pH of $0.588 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_3$ is...

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Q JEE MAIN 2021

n order to prepare a buffer solution of pH 5.74, sodium acetate is added to acetic acid. If the concentration...

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Q JEE MAIN 2021

Two salts $A_2 X$ and $M X$ have the same value of solubility product of $4.0 \times 10^{-12}$. The ratio...

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Q JEE MAIN 2022

Class XII students were asked to prepare one litre of buffer solution of pH 8.26 by their chemistry teacher. The...

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Q JEE MAIN 2022

At 310 K , the solubility of $\mathrm{CaF}_2$ in water is $2.34 \times 10^{-3} \mathrm{~g} / 100 \mathrm{~mL}$. The solubility...

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Q JEE MAIN 2022

$\mathrm{K}_{\mathrm{a}}$ for butyric acid $\left(\mathrm{C}_3 \mathrm{H}_7 \mathrm{COOH}\right)$ is $2 \times 10^{-5}$. The pH of 0.2 M solution of butyric acid...

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Q JEE MAIN 2022

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R....

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Q JEE MAIN 2022

A compound ' X ' is a weak acid and it exhibits colour change at pH close to the equivalence...

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Q JEE MAIN 2022

$\mathrm{Ka}_1, \mathrm{Ka}_2$ and $\mathrm{Ka}_3$ are the respective ionization constants for the following reactions (a) (b), and (c). (a) $...

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Q JEE MAIN 2022

Class XII students were asked to prepare one litre of buffer solution of pH 8.26 by their chemistry teacher. The...

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Q JEE MAIN 2022

The Plot of pH-metric titration of weak base $\mathrm{NH}_4 \mathrm{OH}$ vs strong acid HCl looks like:

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Q JEE MAIN 2022

200 mL of 0.01 M HCl is mixed with 400 mL of $0.01 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4$. The pH of the...

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Q JEE-Main 2022

20 mL of $0.1 \mathrm{M} \mathrm{NH}_4 \mathrm{OH}$ is mixed with 40 mL of 0.05 M HCl . The pH of...

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Q JEE MAIN 2022

A student needs to prepare a buffer solution of propanoic acid and its sodium salt with pH 4. The ratio...

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Q JEE MAIN 2022

pH value of 0.001 M NaOH solution is______.

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Q JEE MAIN 2022

The neutralization occurs when 10 mL of 0.1 M acid ‘A’ is allowed to react with 30 mL of 0.05...

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Q JEE MAIN 2022

Given below are two statements one is labelled as Assertion A and the other is labelled as Reason R: Assertion...

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Q JEE MAIN 2022

The $\mathrm{K}_{\mathrm{sp}}$ for bismuth sulphide $\left(\mathrm{Bi}_2 \mathrm{~S}_3\right)$ is $1.08 \times 10^{-73}$. The solubility of $\mathrm{Bi}_2 \mathrm{~S}_3$ in $\mathrm{mol} \mathrm{L}^{-1}$ at...

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Q JEE MAIN 2022

50 mL of $0.1 \mathrm{M} \mathrm{CH}_3 \mathrm{COOH}$ is being titrated against 0.1 M NaOH . When 25 mL of NaOH...

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Q JEE MAIN 2022

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

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Q JEE MAIN 2024

Solubility of calcium phosphate (molecular mass, M ) in water is $\mathrm{W}_{\mathrm{g}}$ per 100 mL at $25^{\circ} \mathrm{C}$. Its solubility...

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Q JEE MAIN 2024

The pH of an aqueous solution containing 1 M benzoic acid $\left(\mathrm{pK}_{\mathrm{a}}=4.20\right)$ and 1 M sodium benzoate is 4.5. The...

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Q JEE MAIN 2025

$x \mathrm{mg}$ of $\mathrm{Mg}(\mathrm{OH})_2($ molar mass $=58)$ is required to be dissolved in 1.0 L of water to produce a...

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Q JEE MAIN 2025

One litre buffer solution was prepared by adding 0.10 mol each of and in deionised water. The change in pH...

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Q JEE-Main_2023

At 298 K, the solubility of silver chloride in water is $1.434 \times 10^{-3} \mathrm{~g} \mathrm{~L}^{-1}$. The value of $...

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Q JEE MAIN 2023

20 mL of 0.1 M NaOH is added to 50 mL of 0.1 M acetic acid solution. The pH of...

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Q JEE MAIN 2023

The solubility product of $\mathrm{BaSO}_4$ is $1 \times 10^{-10}$ at 298 K . The solubility of $\mathrm{BaSO}_4$ in 0.1 $...

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Q JEE MAIN 2023

Given below are two statements:- Statement I: In redox titration, the indicators used are sensitive to change in pH of...

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Q JEE MAIN 2023

Given below are two statements:- Statement I: Methyl orange is a weak acid. Statement II: The benzenoid form of methyl...

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Q JEE MAIN 2023

If the pKa of lactic acid is 5 , then the pH of 0.005 M calcium lactate solution at $...

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Q JEE MAIN 2023

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

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Q JEE-Main_2023

Incorrect statement for the use of indicators in acid–base titration is : (1) Methyl orange may be used for a...

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Q JEE MAIN 2023

25.0 mL of 0.050 M Ba(NO3)2 is mixed with 25.0 mL of 0.020 M NaF. Ksp of BaF2 is 0.5...

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Q JEE MAIN 2023

Which of the following statement(s) is/are correct? (A) The pH of $1 \times 10^{-8} \mathrm{M} \mathrm{HCl}$ solution is 8 ....

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Q JEE MAIN 2023

25 mL of silver nitrate solution (1 M) is added dropwise to 25 mL of potassium iodide (1.05 M) solution....

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Q JEE MAIN 2023

The dissociation constant of acetic is $\mathrm{x} \times 10^{-5}$. When 25 mL of $0.2 \mathrm{M} \mathrm{CH}_3 \mathrm{COONa}$ solution is mixed...

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Q JEE MAIN 2023

Millimoles of calcium hydroxyide required to produce 100 mL of the aqueous solution of pH 12 is x × 10–1....

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Q JEE MAIN 2023

A litre of buffer solution contains 0.1 mole of each of $\mathrm{NH}_3$ and $\mathrm{NH}_4 \mathrm{Cl}$. On the addition of 0.02...

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Q JEE MAIN 2023

The dissociation constant of acetic is $\mathrm{x} \times 10^{-5}$. When 25 mL of $0.2 \mathrm{M} \mathrm{CH}_3 \mathrm{COONa}$ solution is mixed...

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Q JEE MAIN 2024

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...

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Q JEE MAIN 2024

The pH at which $\mathrm{Mg}(\mathrm{OH})_2\left[\mathrm{~K}_{\mathrm{sp}}=1 \times 10^{-11}\right]$ begins to precipitate from a solution containing 0.10 M $\mathrm{Mg}^{2+}$ ions is

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Q JEE MAIN 2024

Given below are two statements : Statement (I) : Aqueous solution of ammonium carbonate is basic. Statement (II) : Acidic/basic...

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Q JEE MAIN 2025

An aqueous solution of HCl with pH 1.0 is diluted by adding equal volume of water (ignoring dissociation of water)....

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Q JEE MAIN 2025

The pH of a 0.01 M weak acid ${\rm{HX}}\left( {{{\rm{K}}_a} = 4 \times {{10}^{ - 10}}} \right)$ is found to...

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Q JEE MAIN 2025

Arrange the following in increasing order of solubility product : $\mathrm{Ca}(\mathrm{OH})_{2}, \mathrm{AgBr}, \mathrm{PbS}, \mathrm{HgS}$

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Q JEE MAIN 2025

Which of the following mixing of 1 M base and 1 M acid leads to the largest increase in temperature?

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Q JEE MAIN 2025

If equal volumes of $A{B_2}$ and XY (both are salts) aqueous solutions are mixed, which of the following combination will...

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Q JEE MAIN 2025

pH of water is 7 at $25^{\circ} \mathrm{C}$. If water is heated to $80^{\circ} \mathrm{C}$., it's pH will :

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Q JEE MAIN 2025

A weak acid HA has degree of dissociation x . Which option gives the correct expression of ${\rm{(pH}} - {\rm{p}}{{\rm{K}}_{\rm{a}}})$...

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Q JEE MAIN 2025

$\;{{\rm{K}}_{{\rm{sp }}}}$ for ${\rm{Cr}}{({\rm{OH}})_3}$ is $1.6 \times {10^{ - 30}}$. What is the molar solubility of this salt in water?

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Q JEE MAIN 2025

If 1 mM solution of ethylamine produces $\text{pH}=9$ , then the ionization constant $\left( {{{\text{K}}_{\text{b}}}} \right)$ of ethylamine is ${{10}^{{-x}}}$....

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Q JEE MAIN 2025

Which of the following happens when $\text{N}{{\text{H}}_{4}}\text{OH}$ is added gradually to the solution containing 1 M ${{\text{A}}^{{2+}}}$ and ions? Given...

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Q JEE MAIN 2025

The molar solubility(s) of zirconium phosphate with molecular formula $\left(\mathrm{Zr}^{4+}\right)_3\left(\mathrm{PO}_4^{3-}\right)_4$ is given by relation :

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Q JEE MAIN 2025

Some $\mathrm{CO}_2$ gas was kept in a sealed container at a pressure of 1 atm and at 273 K ....

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