1

JEE Main 2020 (Online) 6th September Evening Slot

Numerical

+4

-0

If the solubility product of AB

[Assuming that neither kind of ion reacts with water]

_{2}is 3.20 $$ \times $$ 10^{–11}M^{3}, then the solubility of AB_{2}in pure water is _____ $$ \times $$ 10^{–4}mol L^{–1}.[Assuming that neither kind of ion reacts with water]

Your input ____

2

JEE Main 2020 (Online) 5th September Morning Slot

Numerical

+4

-0

A soft drink was bottled with a partial pressure of CO

(First dissociation constant of

H

of the soft drink = 1 g mL

_{2}of 3 bar over the liquid at room temperature. The partial pressure of CO_{2}over the solution approaches a value of 30 bar when 44 g of CO_{2}is dissolved in 1 kg of water at room temperature. The approximate pH of the soft drink is ______ $$ \times $$ 10^{–1}.(First dissociation constant of

H

_{2}CO_{3}= 4.0 $$ \times $$ 10^{–7}; log 2 = 0.3; densityof the soft drink = 1 g mL

^{–1}) .Your input ____

3

JEE Main 2020 (Online) 7th January Evening Slot

Numerical

+4

-0

3 g of acetic acid is added to 250 mL of 0.1 M HCL and the solution made up to 500 mL. To 20 mL
of this solutions $${1 \over 2}$$ mL of 5 M NaOH is added. The pH of the solution is __________.

[Given : pKa of acetic acid = 4.75, molar mass of acetic of acid = 60 g/mol, log 3 = 0.4771] Neglect any changes in volume.

[Given : pKa of acetic acid = 4.75, molar mass of acetic of acid = 60 g/mol, log 3 = 0.4771] Neglect any changes in volume.

Your input ____

4

JEE Main 2020 (Online) 7th January Morning Slot

Numerical

+4

-0

Two solutions, A and B, each of 100L was made by dissolving 4g of NaOH and 9.8 g of H

_{2}SO_{4}in water, respectively. The pH of the resultant solution obtained from mixing 40L of solution A and 10L of solution B is :Your input ____

Questions Asked from Ionic Equilibrium (Numerical)

Number in Brackets after Paper Indicates No. of Questions

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