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JEE Chemical Equilibrium PYQs with Solutions

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

314 questionsChemistry2002–2026Answers + solutions

About Chemical Equilibrium PYQs

Chemical Equilibrium has 314 previous year questions in the Quantrex Academy JEE Main & Advanced Chemistry bank. The 220 questions in this list come from JEE Main (125), NTA Abhyas JEE Main (87), JEE Advanced (6) and 1 other source, 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: 15
  • 2025: 10
  • 2024: 10
  • 2023: 11
  • 2022: 7
  • 2021: 15
  • 2020: 96
  • 2019: 8
  • 2018: 7
  • 2017: 1
  • 2016: 4
  • 2015: 2

Chemical Equilibrium questions with solutions

1

Consider the following reactions in which all the reactants and products are present in gaseous state 2xy leftharpoons x_2 + y_2 K_1 = 2.5× 10^5 xy + (1)/(2)z_2 leftharpoons xyz

JEE Main 2026 Solution View → 2

Solid carbon, CaO and CaCO _3 are mixed and allowed to attain equilibrium at T K. CaCO_3(s) leftharpoons CaO(s) + CO_2(g) K_ p_1 = 0.08 atm C(s) + CO_2(g) leftharpoons 2CO(g) K_

JEE Main 2026 Solution View → 3

In a closed flask at 600 K, one mole of X _2 Y _4 (g) attains equilibrium as given below : X_2Y_4(g) leftharpoons 2XY_2(g) At equilibrium, 75\% X _2 Y _4 (g) was dissociated and

JEE Main 2026 Solution View → 4

One mole each of He and A(g) are taken in a 10 L closed flask and heated to 400 K to establish the following equilibrium. A(g) leftharpoons B(g) . K_c for this reaction at 400 K

JEE Main 2026 Solution View → 5

The reaction A(g) leftharpoons B(g) + C(g) was initiated with the amount ' a ' of A(g) . At equilibrium it is found that the amount of A(g) remaining is (a - x) at a total

JEE Main 2026 Solution View → 6

The values of pressure equilibrium constant recorded at different temperatures for the following equilibrium reaction have been given below A(g) leftharpoons B(g) + C(g)

JEE Main 2026 Solution View → 7

For the following reaction at 50° C and at 2 atm pressure, 2N_2O_5(g) leftharpoons 2N_2O_4(g)+O_2(g) N_2O_5 is 50\% dissociated. The magnitude of standard free energy change at

JEE Main 2026 Solution View → 8

At T(K) , the equilibrium constant of A_2(g) + B_2(g) leftharpoons C(g) is 2.7 × 10^ -5 . What is the equilibrium constant for (1)/(3)A_2(g) + (1)/(3)B_2(g) leftharpoons

JEE Main 2026 Solution View → 9

Observe the following equilibrium in a 1 L flask. A(~g) leftharpoons B(~g) At T(K) , the equilibrium concentrations of A and B are 0.5 M and 0.375 M respectively. 0.1 moles of A

JEE Main 2026 Solution View → 10

Consider the following gaseous equilibrium in a closed container of volume ' V ' at T(K) . P_ 2 (~g)+Q_ 2 (~g) leftharpoons 2 PQ(g) 2 moles each of P_ 2 (~g), Q_ 2 (~g) and PQ(g)

JEE Main 2026 Solution View → 11

X_ 2 (~g)+Y_ 2 (~g) leftharpoons 2 Z(g) X_ 2 (~g) and Y_ 2 (~g) are added to a 1 L flask and it is found that the system attains the above equilibrium at T(K) with the number of

JEE Main 2026 Solution View → 12

Consider the general reaction given below at 400 K x ~A(~g) leftharpoons y ~B(~g) The values of K_ p and K_ c are studied under the same condition of temperature but variation in

JEE Main 2026 Solution View → 13

For the following gas phase equilibrium reaction at constant temperature, NH_ 3 (~g) leftharpoons 1 / 2 ~N_ 2 (~g)+3 / 2 H_ 2 (~g) if the total pressure is 3 ~atm and the pressure

JEE Main 2026 Solution View → 14

Dissociation of a gas A_ 2 takes place according to the following chemical reaction. At equilibrium, the total pressure is 1 bar at 300 K. A_ 2 (~g) leftharpoons 2 ~A(~g) The

JEE Main 2026 Solution View → 15

For the reaction, N_ 2 O_ 4 leftharpoons 2 NO_ 2 , graph is plotted as shown below. Identify correct statements. A. Standard free energy change for the reaction is -5.40 ~kJ ~mol^

JEE Main 2026 Solution View → 16

Given below are two statements Statement I : A catalyst cannot alter the equilibrium constant (K_ c ) of the reaction, temperature remaining constant Statement II : A homogenous

JEE Main 2025 Solution View → 17

In the following system, PCl_5(~g) leftharpoons PCl_3(~g)+Cl_2(~g) at equilibrium, upon addition of xenon gas at constant T \& p , the concentration of

JEE Main 2025 Solution View → 18

Consider the following chemical equilibrium of the gas phase reaction at a constant temperature : A(~g) leftharpoons B(~g)+C(~g) If p being the total pressure, K_p is the pressure

JEE Main 2025 Solution View → 19

Consider the following equilibrium, \(CO(g)+ 2 H _ 2 ( g) leftharpoons CH _ 3 OH(g) \) 0.1 mol of CO along with a catalyst is present in a \(2 dm^ 3\) flask maintained at 500 K.

JEE Main 2025 Solution View → 20

Consider the equilibrium CO(~g)+3 H_2(~g) leftharpoons CH_4(~g)+H_2 O(~g) If the pressure applied over the system increases by two fold at constant temperature then (A)

JEE Main 2025 Solution View → 21

At temperature T, compound \(AB_ 2(~g) \) dissociates as \(AB_ 2(~g) leftharpoons AB_ (g) +(1)/(2) ~B_ 2(~g) \) having degree of dissociation \(x\) (small compared to unity). The

JEE Main 2025 Solution View → 22

For the reaction, H_2(~g)+I_2(~g) leftharpoons 2 HI(~g) Attainment of equillibrium is predicted correctly by :

JEE Main 2025 Solution View → 23

37.8 ~g ~N_2 O_5 was taken in a 1 L reaction vessel and allowed to undergo the following reaction at 500 K 2 ~N_2 O_ 5(~g) leftharpoons 2 ~N_2 O_ 4(~g) +O_ 2(~g) The total

JEE Main 2025 Solution View → 24

Consider the reaction X_2 Y(~g)=X_2(~g)+(1)/(2) Y_2(~g) The equation representing correct relationship between the degree of dissociation (x) of X_2 Y(g) with its equilibrium

JEE Main 2025 Solution View → 25

A vessel at 1000 K contains CO_2 with a pressure of 0.5 atm . Some of CO_2 is converted into CO on addition of graphite. If total pressure at equilibrium is 0.8 atm , then Kp is :

JEE Main 2025 Solution View → 26

The equilibrium \(Cr_2 O_7^ 2- leftharpoons 2 CrO_4^ 2- \) is shifted to the right in :

JEE Main 2024 Solution View → 27

For the given hypothetical reactions, the equilibrium constants are as follows : aligned & X leftharpoons Y ; K_1=1.0 & Y leftharpoons Z ; K_2=2.0 & Z leftharpoons W ; K_3=4.0

JEE Main 2024 Solution View → 28

The ratio \((K_P)/(K_C)\) for the reaction : \(CO_ (g) +(1)/(2) O_ 2(~g) leftharpoons CO_ 2(~g) \) is :

JEE Main 2024 Solution View → 29

At \(-20^ ^ ∘ C \) and \(1 ~atm \) pressure, a cylinder is filled with equal number of \( H _ 2 , I _ 2 \) and \( HI \) molecules for the reaction \( H _ 2 ( ~g)+I _ 2 ( ~g)

JEE Main 2024 Solution View → 30

The following reaction occurs in the Blast furnance where iron ore is reduced to iron metal \(Fe_2 O_ 3(~s) +3 CO_ (g) leftharpoons Fe_ (l) +3 CO_ 2(~g) \) Using the

JEE Main 2024 Solution View → 31

The equilibrium constant for the reaction \( SO _ 3 ( g) leftharpoons SO _ 2 ( ~g)+(1)/(2) O _ 2 ( ~g)\) is \(K_ c =4.9 ×10^ -2 \). The value of \( K_ c \) for the reaction given

JEE Main 2024 Solution View → 32

A _ (g) ⇌ B _ (g) + C 2 ^ (g) . The correct relationship between K _ P , α and equilibrium pressure P is

JEE Main 2024 Solution View → 33

For the given reaction, choose the correct expression of K _ C from the following: Fe ^ 3 + (aq) + SCN ^ - (aq) ⇌ ( FeSCN ) ^ 2 + (aq)

JEE Main 2024 Solution View → 34

The following concentrations were observed at 500K for the formation of NH _ 3 from N _ 2 and H _ 2 . At equilibrium : [ N _ 2 ] = 2 × 10 ^ - 2 M, [ H _ 2 ] = 3 × 10 ^ - 2 M and [

JEE Main 2024 Solution View → 35

For the reaction N _ 2 O _ 4 ( g ) ⇌ 2 NO _ 2 ( g ) , K _ p = 0 . 492atm at 300K . K _ c for the reaction at same temperature is ______ × 10 ^ - 2 . (Given : R = 0 . 082Latm mol ^

JEE Main 2024 Solution View → 36

4 . 5 moles each of hydrogen and iodine is heated in a sealed ten litre vessel.At equilibrium, 3 moles of HI were found. The equilibrium constant for H _ 2 (g) + I _ 2 (g) ⇌ 2 HI

JEE Main 2023 Solution View → 37

A mixture of one mole of H _ 2 O and 1 mole of CO is taken in a 10litre container and heated to 725K . At equilibrium 40 % of water by mass reacts with carbon monoxide according

JEE Main 2023 Solution View → 38

The number of correct statement/s involving equilibria in physical processes from the following is ________ (A) Equilibrium is possible only in a closed system at a given

JEE Main 2023 Solution View → 39

The equilibrium composition for the reaction PCl _ 3 + Cl _ 2 ⇌ _ PCl _ 5 at 298K is given below: [ PCl _ 3 ] _ eq = 0 . 2mol L ^ - 1 , [ Cl _ 2 ] _ eq = 0 . 1mol L ^ - 1 , [ PCl

JEE Main 2023 Solution View → 40

For a concentrated solution of a weak electrolyte ( K _ eq = equilibrium constant) A _ 2 B _ 3 of concentration ‘ C ’ , the degree of dissociation ‘ α ’ is

JEE Main 2023 Solution View → 41

The effect of addition of helium gas to the following reaction in equilibrium state at constant volume, is : PCI _ 5 ( g ) ⇌ PCl _ 3 ( g ) + Cl _ 2 ( g )

JEE Main 2023 Solution View → 42

(i) X ( g ) ⇌ Y ( g ) + Z ( g ) K _ p1 = 3 (ii) A ( g ) ⇌ 2B ( g ) K _ p2 = 1 If the degree of dissociation and initial concentration of both the reactants X ( g ) and A ( g ) are

JEE Main 2023 Solution View → 43

For reaction: SO _ 2 ( g ) + (1)/(2) O _ 2 ( g ) ⇌ SO _ 3 ( g ) K _ P = 2 × 10 ^ 12 at 27 ° C and 1atm pressure. The K _ c for the same reaction is × 10 ^ 13 . ( Nearest integer)

JEE Main 2023 Solution View → 44

Consider the following equation: 2 SO _ 2 (g) + O _ 2 (g) ⇌ 2 SO _ 3 (g), Δ H = - 190kJ . The number of factors which will increase the yield of SO _ 3 at equilibrium from the

JEE Main 2023 Solution View → 45

At 298K N _ 2 (g) + 3 H _ 2 (g) ⇌ 2 NH _ 3 (g), K _ 1 = 4 × 10 ^ 5 N _ 2 (g) + O _ 2 (g) ⇌ 2NO(g), K _ 2 = 1 . 6 × 10 ^ 12 H _ 2 (g) + (1)/(2) O _ 2 (g) ⇌ H _ 2 O ( g ) , K _ 3 =

JEE Main 2023 Solution View → 46

Water decomposes at 2300K H _ 2 O(g) → H _ 2 (g) + (1)/(2) O _ 2 (g) The percent of water decomposing at 2300K and 1 bar is _____ (Nearest integer). Equilibrium constant for the

JEE Main 2023 Solution View → 47

At 600K, 2mol of NO are mixed with 1mol of O _ 2 . 2 NO _ (g) + O _ 2 (g) ⇄ 2 NO _ 2 (g) The reaction occurring as above comes to equilibrium under a total pressure of 1 atm.

JEE Main 2022 Solution View → 48

At 298K , the equilibrium constant is 2 × 10 ^ 15 for the reaction: Cu(s) + 2 Ag ^ + (aq) ⇌ Cu ^ 2 + (aq) + 2Ag(s) The equilibrium constant for the reaction (1)/(2) Cu ^ 2 + (aq)

JEE Main 2022 Solution View → 49

4 . 0 moles of argon and 5 . 0 moles of PCl _ 5 are introduced into an evacuated flask of 100 litre capacity at 610K . The system is allowed to equilibrate. At equilibrium, the

JEE Main 2022 Solution View → 50

2NOCl(g) ⇌ 2NO(g) + Cl _ 2 (g) In an experiment, 2 . 0 moles of NOCl was placed in a one-litre flask and the concentration of NO after equilibrium established, was found to be 0 .

JEE Main 2022 Solution View → 51

The standard free energy change (Δ G °) for 50 % dissociation of N _ 2 O _ 4 into NO _ 2 at 27 ° C and 1atm pressure is - xJ mol ^ - 1 . The value of x is - . . . . . J . (Nearest

JEE Main 2022 Solution View → 52

PCl _ 5 dissociates as PCl _ 5 (g) ⇌ PCl _ 3 (g) + Cl _ 2 (g) 5 moles of PCl _ 5 are placed in a 200 litre vessel which contains 2 moles of N _ 2 and is maintained at 600K . The

JEE Main 2022 Solution View → 53

For a reaction at equilibrium A (g) ⇌ B (g) + (1)/(2)C(g) the relation between dissociation constant (K) , degree of dissociation (α) and equilibrium pressure (p) is given by :

JEE Main 2022 Solution View → 54

When 5 . 1g of solid NH _ 4 HS is introduced into a two litre evacuated flask at 27 ° C, 20 % of the solid decomposes into gaseous ammonia and hydrogen sulphide. The K _ p for the

JEE Main 2021 Solution View → 55

The number of moles of NH _ 3 , that must be added to 2L of 0 . 80 MAgNO _ 3 in order to reduce the concentration of Ag ^ + ions to 5 . 0 × 10 ^ - 8 M( K _ formation ) for [Ag (

JEE Main 2021 Solution View → 56

In the sulphur estimation, 0 . 471g of an organic compound gave 1 . 44g of barium sulfate. The percentage of sulphur in the compound is. (Nearest integer) (Atomic Mass of Ba =

JEE Main 2021 Solution View → 57

The reaction rate for the reaction [ PtCl _ 4 ] ^ 2 - + H _ 2 O ⇌ [Pt( H _ 2 O) Cl _ 3 ] ^ - + Cl ^ - was measured as a function of concentrations of different species. It was

JEE Main 2021 Solution View → 58

The OH ^ - concentration in a mixture of 5 . 0mL of 0 . 0504M NH _ 4 Cl and 2mL of 0 . 0210M NH _ 3 solution is x × 10 ^ - 6 M . The value of x is (Nearest integer) [Given K _ w =

JEE Main 2021 Solution View → 59

The equilibrium constant for the reaction A ( s ) ⇌ M ( s ) + (1)/(2) O _ 2 ( g ) is K _ p = 4 . At equilibrium, the partial pressure of O _ 2 is _____ atm. (Round off to the

JEE Main 2021 Solution View → 60

PCl _ 5 ⇌ PCl _ 3 + Cl _ 2 K _ c = 1 . 844 3 . 0 moles of PCl _ 5 is introduced in a 1L closed reaction vessel at 380K . The number of moles of PCl _ 5 at equilibrium is — × 10 ^

JEE Main 2021 Solution View → 61

For the reaction A + B ⇌ 2C the value of equilibrium constant is 100 at 298K . If the initial concentration of all the three species is 1M each, then the equilibrium concentration

JEE Main 2021 Solution View → 62

Value of K _ P for the equilibrium reaction N _ 2 O _ 4 ( g ) ⇌ 2 NO _ 2 ( g ) at 288K is 47 . 9 . The K _ C for this reaction at same temperature is (Nearest integer) (R = 0 .

JEE Main 2021 Solution View → 63

2 SO _ 2 ( g ) + O _ 2 ( g ) ⇌ 2 SO _ 3 ( g ) In an equilibrium mixture, the partial pressures are P _ SO _ 3 = 43kPa; P _ O _ 2 = 530Pa and P _ SO _ 2 = 45kPa . The equilibrium

JEE Main 2021 Solution View → 64

Consider the reaction N _ 2 O _ 4 ( g ) ⇌ 2 NO _ 2 ( g ) The temperature at which K _ C = 20 . 4 and K _ P = 600 . 1, is ______ K . (Round off to the Nearest Integer). [Assume all

JEE Main 2021 Solution View → 65

For the reaction A (g) ⇌ B (g) at 495K , Δ _ r G ^ ° = - 9 . 478kJ mol ^ - 1 If we start the reaction in a closed container at 495K with 22 millimoles of A , the amount of Bis the

JEE Main 2021 Solution View → 66

A homogeneous ideal gaseous reaction AB _ 2(g) ⇌ A _ (g) + 2 B _ (g) is carried out in a 25litre flask at 27 ° C . The initial amount of AB _ 2 was 1 mole and the equilibrium

JEE Main 2021 Solution View → 67

The stepwise formation of [Cu ( NH _ 3 ) _ 4 ] ^ 2 + is given below: Cu ^ 2 + + NH _ 3 K _ 1 ⇌ [Cu( NH _ 3 )] ^ 2 + [Cu( NH _ 3 )] ^ 2 + + NH _ 3 K _ 2 ⇌ [Cu ( NH _ 3 ) _ 2 ] ^ 2

JEE Main 2021 Solution View → 68

At 1990K and 1atm pressure, there are equal number of Cl _ 2 molecules and Cl atoms in the reaction mixture. The value of K _ p for the reaction Cl _ 2(g) = 2 Cl _ (g) under the

JEE Main 2021 Solution View → 69

Consider the reaction A ⇌ B at 1000K . At time t ^ ' , the temperature of the system was increased to 2000K and the system was allowed to reach equilibrium. Throughout this

JEE Advanced 2020 Solution View → 70

The value of K _ c us64at800K for the reaction N _ 2 (g) + 3 H _ 2 (g) → 2 NH _ 3 (g) The value of K _ c for the following reaction is : NH _ 3 (g) → (1)/(2) N _ 2 (g) + (3)/(2) H

JEE Main 2020 Solution View → 71

For the reaction Fe _ 2 N(s) + (3)/(2) H _ 2 (g) ⇌ 2Fe(s) + NH _ 3 (g)

JEE Main 2020 Solution View → 72

For a reaction X + Y = 2Z, 1 . 0mol of X, 1 . 5mol of Y and 0 . 5mol of Z were taken in a 1L vessel and allowed to react. At equilibrium, the concentration of Z was 1 . 0 molL ^

JEE Main 2020 Solution View → 73

Consider the following reaction: N _ 2 O _ 4 ( g ) = 2 NO _ 2 ( g ) : Δ H ^ 0 = + 58k For each of the following cases ( a, b ) , the direction in which the equilibrium shifts is

JEE Main 2020 Solution View → 74

If the equilibrium constant for A ⇌ B + C is K _ eq ^ ( 1 ) and that of B + C ⇌ P is K _ eq ^ ( 2 ) , the equilibrium constant for A ⇌ P is :

JEE Main 2020 Solution View → 75

For the following Assertion and Reason, the correct option is Assertion (A) : When Cu (II) and sulphide ions are mixed, they react together extremely quickly to give a solid.

JEE Main 2020 Solution View → 76

An open beaker of water in equilibrium with water vapour is in a sealed container. When a few grams of glucose are added to the beaker of water, the rate at which water molecules :

JEE Main 2020 Solution View → 77

In the figure shown below reactant A (represented by square) is in equilibrium with product B (represented by circle). The equilibrium constant is (approx):

JEE Main 2020 Solution View → 78

Suitable conditions for melting of ice are:

NTA Abhyas JEE Main 2020 Solution View → 79

PCl_ 5 vapour decomposes on heating according to the reaction: PCl _ 5 (g)⇌ PCl _ 3 (g) + Cl _ 2 (g) The density of a sample of a partially dissociated PCl _ 5 at 1.0 atm and 500K

NTA Abhyas JEE Main 2020 Solution View → 80

NH _ 4 HS ( s ) ⇌ NH _ 3 ( g ) + H _ 2 S ( g ) In the above reaction, if the pressure at equilibrium and at 300K is 100atm then what will be the equilibrium constant K _ p ?

NTA Abhyas JEE Main 2020 Solution View → 81

Calculate Δ _ r G for the reaction at 27^ o C H _ 2 (g) +2 Ag ^ + (aq)⇌ 2 Ag (s) +2 H^ + (aq) Given : P _ H2 = 0.5 bar ; [ Ag ^ + ] = 10 ^ - 5 M ; [ H^ + ] = 1 0 ^ - 3 M ; Δ _ f

NTA Abhyas JEE Main 2020 Solution View → 82

The equilibrium constant for a reaction A + B ⇋ C + D is 1 × 10 ^ - 2 at 298K and is 2 at 273K. The chemical process resulting in the formation of C and D is:

NTA Abhyas JEE Main 2020 Solution View → 83

At 300K, A ⇌ _ ProductΔ G _T^ o = - 200 kJmol ^ - 1 B ⇌ _ ProductΔ G _T^ o = - 50 kJmol ^ - 1 Thus, the ratio of equilibrium constant at 300K is

NTA Abhyas JEE Main 2020 Solution View → 84

Ammonium sulphide and ammonium selenide on heating dissociates as (NH_ 4 )_ 2 S(s) ⇌ 2NH_ 3 (g)+ H_ 2 S(g); K_ p1 =9 × 10^ -3 atm^ 3 (NH_ 4 )_ 2 Se(s) ⇌ 2NH_ 3 (g) + H_ 2 Se(g)

NTA Abhyas JEE Main 2020 Solution View → 85

At 800 ° C , the following equilibrium is established as F _ 2 (g)⇌ 2 F(g) The composition of equilibrium may be determined by measuring the rate of effusion of the mixture

NTA Abhyas JEE Main 2020 Solution View → 86

The solubilities of AgBr in water, in 0.01M CaBr_ 2 ,0.01MKBr and in 0.05M AgNO_ 3 are S _ 1 ,S_ 2 ,S_ 3 and S _ 4 respectively. Then the order of solubilities is

NTA Abhyas JEE Main 2020 Solution View → 87

The equilibrium constants \(K_ P 1 \) and \(K_ P 2 \) for the reaction \(X leftharpoons2 Y\) and \(Z leftharpoons P+Q\), respectively are in the ratio of \(1:\) 9. If the degree

NTA Abhyas JEE Main 2020 Solution View → 88

For the reaction, 2 A (g) + B (g) ⇌ C (g) + D (g) ; K _ c = 1 0 ^ 1 2 . If the initial moles of A,B,C and D are 2, 1, 7 and 3 moles respectively in 1L vessel, what is the

NTA Abhyas JEE Main 2020 Solution View → 89

One of the reaction that takes place in producing steel from iron ore is the reduction of iron(II) oxide by carbon monoxide to give iron metal and CO_ 2 . FeO(s)+CO(g) ⇌ Fe(s)+

NTA Abhyas JEE Main 2020 Solution View → 90

Which is correct relationship between K _ p and K _ c for following reversible reaction at 10K temperature? K _ p and K _ c in units of atm and M respectively A _ 2 (g)+ 3B_ 2

NTA Abhyas JEE Main 2020 Solution View → 91

For the reaction 2HI ( g ) ⇌ H _ 2 ( g ) + I _ 2 ( g ) . The value of K _ c is 4. If 2 mol of H _ 2 , 2 mol of I _ 2 and 2 mol of HI are present in one litre container then moles

NTA Abhyas JEE Main 2020 Solution View → 92

Equilibrium constant for the reaction 4A ( g ) ⇌ B ( g ) + 2C ( g ) is – Given: 2A(g) ⇌ B(g) + Y(g); k c _ 1 = 8 C(g) ⇌ A(g) + (1)/(2)Y(g); k c _ 2 = (1)/(4)

NTA Abhyas JEE Main 2020 Solution View → 93

For the following three reactions I,II and III, equilibrium constants are given 1. CO(g) + H _ 2 O(g) ⇌ CO_ 2 (g) + H _ 2 (g); K _ 1 2. CH_ 4 (g) + H _ 2 O(g) ⇌ CO(g) + 3H_ 2 (g)

NTA Abhyas JEE Main 2020 Solution View → 94

Equilibrium constant K_ p for the reaction CaCO_ 3 ⇌ CaO + CO_ 2 is 0.82 atm at 7 2 7 ^ ∘ C. If 1 mole of CaCO_ 3 is placed in a closed container of 20 L and heated to this

NTA Abhyas JEE Main 2020 Solution View → 95

The pH of pure water at 298K and 308K are 7 and 6 respectively. Calculate the heat of formation of water from H^ + and OH^ – .

NTA Abhyas JEE Main 2020 Solution View → 96

For A + B ⇌ C + D , if initially the concentration of A and B are equal but at equilibrium concentration of D will be twice of that of A then what will be the equilibrium constant

NTA Abhyas JEE Main 2020 Solution View → 97

For a reaction A → B, E _ a = 10kJ/mol,Δ H = 5kJ/mol. Thus potential energy profile for this reaction is

NTA Abhyas JEE Main 2020 Solution View → 98

The initial concentration of X and Y were 2 and 4mole/L respectively. For the following equilibrium X + 2Y ⇌ Z which of the following relationship among equilibrium concentrations

NTA Abhyas JEE Main 2020 Solution View → 99

The dissociation equilibrium of a gas AB_ 2 can be represented as, 2 AB_ 2 (g) ⇌ 2AB(g) + B _ 2 (g) The degree of dissociation is x and is small as compared to 1 . The expression

NTA Abhyas JEE Main 2020 Solution View → 100

The equilibrium constant of the following isomerisation reaction at 400K and 298K are 2.07 and 3.42 respectively. Which of the following is/are correct? I. The reaction is

NTA Abhyas JEE Main 2020 Solution View → 101

Acetic acid ( C H _ 3 COOH ) is partially dimerised to (C H _ 3 COOH) _ 2 in the vapour phase. At a total pressure of 0.200atm , acetic acid is 92.0% dimerized at 298K . The value

NTA Abhyas JEE Main 2020 Solution View → 102

1mole of N _ 2 O _ 4 ( g ) at 300K is kept in a closed container under 1atm . It is heated to 600K when 20% by mole of N _ 2 O _ 4 ( g ) decomposes to N O _ 2 ( g ) . The

NTA Abhyas JEE Main 2020 Solution View → 103

For the reaction 3A ⇌ C + 2D , initially A was taken. At equilibrium the concentration of D is twice that of A. The value of K _ c is

NTA Abhyas JEE Main 2020 Solution View → 104

In the esterification C _ 2 H _ 5 OH(l) + C H _ 3 COOH(l) ⇌ C H _ 3 COO C _ 2 H _ 5 (l) + H _ 2 O(l) an equimolar mixture of alcohol and acid taken initially yields under

NTA Abhyas JEE Main 2020 Solution View → 105

Initially 3 moles of ' A ' was taken in a 1L container. The approx. moles of A left in the container when the following equilibrium established is x × 1 0 ^ - 6 .The value of ' x

NTA Abhyas JEE Main 2020 Solution View → 106

The ionisation constant for N H _ 4 ^ + in water is 5.0 × 1 0 ^ - 10 at 25 ^ o C .The rate constant for the reaction of N H _ 4 ^ + and O H ^ - to form N H _ 3 and H _ 2 O at 25 ^

NTA Abhyas JEE Main 2020 Solution View → 107

10 moles of A _ 2 , 15 moles of B _ 2 and 5 moles of AB are placed in a 2 litre vessel and allowed the come to equilibrium. The final concentration of AB is 10.5M , A _ 2 (g) + B

NTA Abhyas JEE Main 2020 Solution View → 108

The equilibrium Cu^ 0 + Cu^ II ⇌ 2Cu^ I In aqueous medium at 25oC shifts towards the left in the presence of (1) C ^ - (2) C ^ - (3) SC ^ - (4) N O_ 3 ^ -

NTA Abhyas JEE Main 2020 Solution View → 109

N H _ 4 HS ( s ) ⇌ N H _ 3 ( g ) + H _ 2 S ( g ) The equilibrium pressure at 25°C is 0.660 atm. What is K _ p for the reaction?

NTA Abhyas JEE Main 2020 Solution View → 110

The equilibrium S O _ 2 C l _ 2 (g) ⇌ S O _ 2 (g) + C l _ 2 (g) is attained at 2 5 ^ 0 C in a closed container and an inert gas, helium is introduced. Which of the following

NTA Abhyas JEE Main 2020 Solution View → 111

Consider reaction, CaCO _ 3 (s) ⇌ CaO(s) + CO _ 2 (g) In a closed container at equilibrium. What would be the effect of addition of CaCO _ 3 on the equilibrium concentration of CO

NTA Abhyas JEE Main 2020 Solution View → 112

What is the equilibrium expression for the reaction P_ 4 (s) + 5 O_ 2 ( g ) ⇌ P_ 4 O_ 10 ( s ) ?

NTA Abhyas JEE Main 2020 Solution View → 113

Hydrogen peroxide (H_ 2 O_ 2 ) decomposes according to the equation 2 H _ 2 O _ 2 ⇌ 2 H _ 2 O (I) + O _ 2 (g) From the following data at 2 5 ^ ∘ C calculate the value of K_ p at

NTA Abhyas JEE Main 2020 Solution View → 114

Consider the following gaseous equilibria with equilibrium constants K_ 1 and K_ 2 respectively. S O_ 2 (g) + (1)/(2) O_ 2 ( g ) ⇌ S O_ 3 ( g ) 2 SO_ 3 (g) ⇌ 2 SO_ 2 (g) + O_ 2 (

NTA Abhyas JEE Main 2020 Solution View → 115

The equilibrium constants at 298 K for a reaction A + B ⇌ C + D is 100. If the initial concentration of all the four species were 1 M each, then equilibrium concentration of D (in

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Equilibrium constant for reaction N H _ 4 OH(aq) + H ^ + (aq) ⇌ N H _ 4 ^ + (aq) + H _ 2 O(l) is 1.8 × 19 ^ 9 . Hence equilibrium constant for ionization N H _ 3 + H _ 2 O ⇌ N H _

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Which of the following lines correctly show the temperature dependence of equilibrium constant K, for an exothermic reaction?

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For the reaction N _ 2 O _ 4 ⇌ 2N O _ 2(g) , the degree of dissociation of N _ 2 O _ 4 is 0.2 at 1atm . Then the K _ p of 2N O _ 2 ⇌ N _ 2 O _ 4 is

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The degree of dissociation of PC l _ 5 ( g ) for the equilibrium PC l _ 5 (g) ⇌ PC l _ 3 (g) + C l _ 2 ( g ) is approximately related to the pressure at equilibrium (P) by the

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500 mL of 0.150 M AgNO 3 solution were added in 500 mL of 1.09 M Fe 2 + solution and the reaction is allowed to reach an equilibrium at 2 5 ^ ∘ C . Ag ^ + (aq) + Fe ^ 2 + (aq) ⇌

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Chemical Equilibrium in other exams

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