1

JEE Main 2021 (Online) 26th August Evening Shift

Numerical

+4

-1

The equilibrium constant K

_{c}at 298 K for the reaction A + B $$\rightleftharpoons$$ C + D is 100. Starting with an equimolar solution with concentrations of A, B, C and D all equal to 1M, the equilibrium concentration of D is ___________ $$\times$$ 10^{$$-$$2}M. (Nearest integer)Your input ____

2

JEE Main 2021 (Online) 26th August Evening Shift

Numerical

+4

-1

The reaction rate for the reaction

[PtCl

was measured as a function of concentrations of different species. It was observed that $${{ - d\left[ {{{\left[ {PtC{l_4}} \right]}^{2 - }}} \right]} \over {dt}} = 4.8 \times {10^{ - 5}}\left[ {{{\left[ {PtC{l_4}} \right]}^{2 - }}} \right] - 2.4 \times {10^{ - 3}}\left[ {{{\left[ {Pt({H_2}O)C{l_3}} \right]}^ - }} \right]\left[ {C{l^ - }} \right]$$.

where square brackets are used to denote molar concentrations. The equilibrium constant K

[PtCl

_{4}]^{2$$-$$}+ H_{2}O $$\rightleftharpoons$$ [Pt(H_{2}O)Cl_{3}]^{$$-$$}+ Cl^{$$-$$}was measured as a function of concentrations of different species. It was observed that $${{ - d\left[ {{{\left[ {PtC{l_4}} \right]}^{2 - }}} \right]} \over {dt}} = 4.8 \times {10^{ - 5}}\left[ {{{\left[ {PtC{l_4}} \right]}^{2 - }}} \right] - 2.4 \times {10^{ - 3}}\left[ {{{\left[ {Pt({H_2}O)C{l_3}} \right]}^ - }} \right]\left[ {C{l^ - }} \right]$$.

where square brackets are used to denote molar concentrations. The equilibrium constant K

_{c}= ____________ . (Nearest integer)Your input ____

3

JEE Main 2021 (Online) 26th August Morning Shift

Numerical

+4

-1

The OH

[Given K

^{$$-$$}concentration in a mixture of 5.0 mL of 0.0504 M NH_{4}Cl and 2 mL of 0.0210 M NH_{3}solution is x $$\times$$ 10^{$$-$$6}M. The value of x is ___________. (Nearest integer)[Given K

_{w}= 1 $$\times$$ 10^{$$-$$14}and K_{b}= 1.8 $$\times$$ 10^{$$-$$5}]Your input ____

4

JEE Main 2021 (Online) 27th July Evening Shift

Numerical

+4

-1

The equilibrium constant for the reaction

A(s) $$\rightleftharpoons$$ M(s) + $${1 \over 2}$$O

is K

A(s) $$\rightleftharpoons$$ M(s) + $${1 \over 2}$$O

_{2}(g)is K

_{p}= 4. At equilibrium, the partial pressure of O_{2}is _________ atm. (Round off to the nearest integer)Your input ____

Questions Asked from Chemical Equilibrium (Numerical)

Number in Brackets after Paper Indicates No. of Questions

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