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Home/JEE MAINS/chemistry/equilibrium
Curated PYQ Collection

Top 50 Most Repeated EQUILIBRIUM PYQs | JEE MAINS

A curated collection of the most important questions from EQUILIBRIUM, fully solved with step-by-step concepts to prepare for JEE MAINS.

Question #1

Practice Question

A.$\frac{P_{NH_3}^2}{P_{N_2} P_{H_2}^3}$
B.$\frac{P_{N_2} P_{H_2}^3}{P_{NH_3}^2}$
C.$\frac{2P_{NH_3}}{P_{N_2} \cdot 3P_{H_2}}$
D.$\frac{P_{NH_3}}{P_{N_2} P_{H_2}}$

Concept Applied

$K_p$ = (partial pressures of products)^stoich / (reactants)^stoich...

Read Full Step-by-Step Solution →

Question #2

Practice Question

Concept Applied

Using the Henderson–Hasselbalch equation: $\text{pH}=\text{p}K_a+\log\frac{[A^-]}{[HA]} = 4.76+\log\frac{0.10}{0.20}=4.76+\log0.5 = 4.76-0.301 = 4.459...

Read Full Step-by-Step Solution →

Question #3

Practice Question

A.$K_p = K_c (RT)^2$
B.$K_p = K_c (RT)^{-2}$
C.$K_p = K_c (RT)^{-1}$
D.$K_p = K_c (RT)$

Concept Applied

The relationship is $K_p = K_c (RT)^{\Delta n}$, where $\Delta n = 2 - (1 + 3) = -2$. So $K_p = K_c (RT)^{-2}$....

Read Full Step-by-Step Solution →

Question #4

Practice Question

Concept Applied

$\Delta n = -1$, so $K_p = K_c(RT)^{-1} = 4/(0.0821\times300) \approx 0.16$...

Read Full Step-by-Step Solution →

Question #5

Practice Question

Concept Applied

With the common ion \(\ce{Cl^-}\) from NaCl, \([\ce{Cl^-}] \approx 0.010\ \text{M}\). Using \(K_{sp}= [\ce{Ag^+}][\ce{Cl^-}]\), we get \([\ce{Ag^+}] =...

Read Full Step-by-Step Solution →

Question #6

Practice Question

A.5.76
B.3.76
C.4.76
D.6.76

Concept Applied

$pH = 4.76 + \log(10) = 5.76$....

Read Full Step-by-Step Solution →

Question #7

Practice Question

A.Theoretical foundations
B.Practical applications
C.Experimental data
D.Historical context

Concept Applied

Foundational check for Equilibrium. Study the core principles carefully for competitive exams....

Read Full Step-by-Step Solution →

Question #8

Practice Question

A.0.25 atm
B.0.5 atm
C.0.75 atm
D.1.0 atm

Concept Applied

The equilibrium constant expression for the reaction is Kp = (PCO2) / (PCO). Using the given Kp value and initial pressure of CO, we can calculate the...

Read Full Step-by-Step Solution →

Question #9

Practice Question

A.$\frac{P_{NH_3}^2}{P_{N_2} P_{H_2}^3}$
B.$\frac{P_{N_2} P_{H_2}^3}{P_{NH_3}^2}$
C.$\frac{2P_{NH_3}}{P_{N_2} \cdot 3P_{H_2}}$
D.$\frac{P_{NH_3}}{P_{N_2} P_{H_2}}$

Concept Applied

$K_p$ = (partial pressures of products)^stoich / (reactants)^stoich...

Read Full Step-by-Step Solution →

Question #10

Practice Question

Concept Applied

Using the Henderson–Hasselbalch equation: $\text{pH}=\text{p}K_a+\log\frac{[A^-]}{[HA]} = 4.76+\log\frac{0.10}{0.20}=4.76+\log0.5 = 4.76-0.301 = 4.459...

Read Full Step-by-Step Solution →

Question #11

Practice Question

A.$K_p = K_c (RT)^2$
B.$K_p = K_c (RT)^{-2}$
C.$K_p = K_c (RT)^{-1}$
D.$K_p = K_c (RT)$

Concept Applied

The relationship is $K_p = K_c (RT)^{\Delta n}$, where $\Delta n = 2 - (1 + 3) = -2$. So $K_p = K_c (RT)^{-2}$....

Read Full Step-by-Step Solution →

Question #12

Practice Question

Concept Applied

$\Delta n = -1$, so $K_p = K_c(RT)^{-1} = 4/(0.0821\times300) \approx 0.16$...

Read Full Step-by-Step Solution →

Question #13

Practice Question

Concept Applied

With the common ion \(\ce{Cl^-}\) from NaCl, \([\ce{Cl^-}] \approx 0.010\ \text{M}\). Using \(K_{sp}= [\ce{Ag^+}][\ce{Cl^-}]\), we get \([\ce{Ag^+}] =...

Read Full Step-by-Step Solution →

Question #14

Practice Question

A.5.76
B.3.76
C.4.76
D.6.76

Concept Applied

$pH = 4.76 + \log(10) = 5.76$....

Read Full Step-by-Step Solution →

Question #15

Practice Question

A.Theoretical foundations
B.Practical applications
C.Experimental data
D.Historical context

Concept Applied

Foundational check for Equilibrium. Study the core principles carefully for competitive exams....

Read Full Step-by-Step Solution →

Question #16

Practice Question

A.0.25 atm
B.0.5 atm
C.0.75 atm
D.1.0 atm

Concept Applied

The equilibrium constant expression for the reaction is Kp = (PCO2) / (PCO). Using the given Kp value and initial pressure of CO, we can calculate the...

Read Full Step-by-Step Solution →

Question #17

Practice Question

A.$\frac{P_{NH_3}^2}{P_{N_2} P_{H_2}^3}$
B.$\frac{P_{N_2} P_{H_2}^3}{P_{NH_3}^2}$
C.$\frac{2P_{NH_3}}{P_{N_2} \cdot 3P_{H_2}}$
D.$\frac{P_{NH_3}}{P_{N_2} P_{H_2}}$

Concept Applied

$K_p$ = (partial pressures of products)^stoich / (reactants)^stoich...

Read Full Step-by-Step Solution →

Question #18

Practice Question

Concept Applied

Using the Henderson–Hasselbalch equation: $\text{pH}=\text{p}K_a+\log\frac{[A^-]}{[HA]} = 4.76+\log\frac{0.10}{0.20}=4.76+\log0.5 = 4.76-0.301 = 4.459...

Read Full Step-by-Step Solution →

Question #19

Practice Question

A.$K_p = K_c (RT)^2$
B.$K_p = K_c (RT)^{-2}$
C.$K_p = K_c (RT)^{-1}$
D.$K_p = K_c (RT)$

Concept Applied

The relationship is $K_p = K_c (RT)^{\Delta n}$, where $\Delta n = 2 - (1 + 3) = -2$. So $K_p = K_c (RT)^{-2}$....

Read Full Step-by-Step Solution →

Question #20

Practice Question

Concept Applied

$\Delta n = -1$, so $K_p = K_c(RT)^{-1} = 4/(0.0821\times300) \approx 0.16$...

Read Full Step-by-Step Solution →

Question #21

Practice Question

Concept Applied

With the common ion \(\ce{Cl^-}\) from NaCl, \([\ce{Cl^-}] \approx 0.010\ \text{M}\). Using \(K_{sp}= [\ce{Ag^+}][\ce{Cl^-}]\), we get \([\ce{Ag^+}] =...

Read Full Step-by-Step Solution →

Question #22

Practice Question

A.5.76
B.3.76
C.4.76
D.6.76

Concept Applied

$pH = 4.76 + \log(10) = 5.76$....

Read Full Step-by-Step Solution →

Question #23

Practice Question

A.Theoretical foundations
B.Practical applications
C.Experimental data
D.Historical context

Concept Applied

Foundational check for Equilibrium. Study the core principles carefully for competitive exams....

Read Full Step-by-Step Solution →

Question #24

Practice Question

A.0.25 atm
B.0.5 atm
C.0.75 atm
D.1.0 atm

Concept Applied

The equilibrium constant expression for the reaction is Kp = (PCO2) / (PCO). Using the given Kp value and initial pressure of CO, we can calculate the...

Read Full Step-by-Step Solution →

Question #25

Practice Question

A.$\frac{P_{NH_3}^2}{P_{N_2} P_{H_2}^3}$
B.$\frac{P_{N_2} P_{H_2}^3}{P_{NH_3}^2}$
C.$\frac{2P_{NH_3}}{P_{N_2} \cdot 3P_{H_2}}$
D.$\frac{P_{NH_3}}{P_{N_2} P_{H_2}}$

Concept Applied

$K_p$ = (partial pressures of products)^stoich / (reactants)^stoich...

Read Full Step-by-Step Solution →

Question #26

Practice Question

Concept Applied

Using the Henderson–Hasselbalch equation: $\text{pH}=\text{p}K_a+\log\frac{[A^-]}{[HA]} = 4.76+\log\frac{0.10}{0.20}=4.76+\log0.5 = 4.76-0.301 = 4.459...

Read Full Step-by-Step Solution →

Question #27

Practice Question

A.$K_p = K_c (RT)^2$
B.$K_p = K_c (RT)^{-2}$
C.$K_p = K_c (RT)^{-1}$
D.$K_p = K_c (RT)$

Concept Applied

The relationship is $K_p = K_c (RT)^{\Delta n}$, where $\Delta n = 2 - (1 + 3) = -2$. So $K_p = K_c (RT)^{-2}$....

Read Full Step-by-Step Solution →

Question #28

Practice Question

Concept Applied

$\Delta n = -1$, so $K_p = K_c(RT)^{-1} = 4/(0.0821\times300) \approx 0.16$...

Read Full Step-by-Step Solution →

Question #29

Practice Question

Concept Applied

With the common ion \(\ce{Cl^-}\) from NaCl, \([\ce{Cl^-}] \approx 0.010\ \text{M}\). Using \(K_{sp}= [\ce{Ag^+}][\ce{Cl^-}]\), we get \([\ce{Ag^+}] =...

Read Full Step-by-Step Solution →

Question #30

Practice Question

A.5.76
B.3.76
C.4.76
D.6.76

Concept Applied

$pH = 4.76 + \log(10) = 5.76$....

Read Full Step-by-Step Solution →

Question #31

Practice Question

A.Theoretical foundations
B.Practical applications
C.Experimental data
D.Historical context

Concept Applied

Foundational check for Equilibrium. Study the core principles carefully for competitive exams....

Read Full Step-by-Step Solution →

Question #32

Practice Question

A.0.25 atm
B.0.5 atm
C.0.75 atm
D.1.0 atm

Concept Applied

The equilibrium constant expression for the reaction is Kp = (PCO2) / (PCO). Using the given Kp value and initial pressure of CO, we can calculate the...

Read Full Step-by-Step Solution →

Question #33

Practice Question

A.$\frac{P_{NH_3}^2}{P_{N_2} P_{H_2}^3}$
B.$\frac{P_{N_2} P_{H_2}^3}{P_{NH_3}^2}$
C.$\frac{2P_{NH_3}}{P_{N_2} \cdot 3P_{H_2}}$
D.$\frac{P_{NH_3}}{P_{N_2} P_{H_2}}$

Concept Applied

$K_p$ = (partial pressures of products)^stoich / (reactants)^stoich...

Read Full Step-by-Step Solution →

Question #34

Practice Question

Concept Applied

Using the Henderson–Hasselbalch equation: $\text{pH}=\text{p}K_a+\log\frac{[A^-]}{[HA]} = 4.76+\log\frac{0.10}{0.20}=4.76+\log0.5 = 4.76-0.301 = 4.459...

Read Full Step-by-Step Solution →

Question #35

Practice Question

A.$K_p = K_c (RT)^2$
B.$K_p = K_c (RT)^{-2}$
C.$K_p = K_c (RT)^{-1}$
D.$K_p = K_c (RT)$

Concept Applied

The relationship is $K_p = K_c (RT)^{\Delta n}$, where $\Delta n = 2 - (1 + 3) = -2$. So $K_p = K_c (RT)^{-2}$....

Read Full Step-by-Step Solution →

Question #36

Practice Question

Concept Applied

$\Delta n = -1$, so $K_p = K_c(RT)^{-1} = 4/(0.0821\times300) \approx 0.16$...

Read Full Step-by-Step Solution →

Question #37

Practice Question

Concept Applied

With the common ion \(\ce{Cl^-}\) from NaCl, \([\ce{Cl^-}] \approx 0.010\ \text{M}\). Using \(K_{sp}= [\ce{Ag^+}][\ce{Cl^-}]\), we get \([\ce{Ag^+}] =...

Read Full Step-by-Step Solution →

Question #38

Practice Question

A.5.76
B.3.76
C.4.76
D.6.76

Concept Applied

$pH = 4.76 + \log(10) = 5.76$....

Read Full Step-by-Step Solution →

Question #39

Practice Question

A.Theoretical foundations
B.Practical applications
C.Experimental data
D.Historical context

Concept Applied

Foundational check for Equilibrium. Study the core principles carefully for competitive exams....

Read Full Step-by-Step Solution →

Question #40

Practice Question

A.0.25 atm
B.0.5 atm
C.0.75 atm
D.1.0 atm

Concept Applied

The equilibrium constant expression for the reaction is Kp = (PCO2) / (PCO). Using the given Kp value and initial pressure of CO, we can calculate the...

Read Full Step-by-Step Solution →

Question #41

Practice Question

A.$\frac{P_{NH_3}^2}{P_{N_2} P_{H_2}^3}$
B.$\frac{P_{N_2} P_{H_2}^3}{P_{NH_3}^2}$
C.$\frac{2P_{NH_3}}{P_{N_2} \cdot 3P_{H_2}}$
D.$\frac{P_{NH_3}}{P_{N_2} P_{H_2}}$

Concept Applied

$K_p$ = (partial pressures of products)^stoich / (reactants)^stoich...

Read Full Step-by-Step Solution →

Question #42

Practice Question

Concept Applied

Using the Henderson–Hasselbalch equation: $\text{pH}=\text{p}K_a+\log\frac{[A^-]}{[HA]} = 4.76+\log\frac{0.10}{0.20}=4.76+\log0.5 = 4.76-0.301 = 4.459...

Read Full Step-by-Step Solution →

Question #43

Practice Question

A.$K_p = K_c (RT)^2$
B.$K_p = K_c (RT)^{-2}$
C.$K_p = K_c (RT)^{-1}$
D.$K_p = K_c (RT)$

Concept Applied

The relationship is $K_p = K_c (RT)^{\Delta n}$, where $\Delta n = 2 - (1 + 3) = -2$. So $K_p = K_c (RT)^{-2}$....

Read Full Step-by-Step Solution →

Question #44

Practice Question

Concept Applied

$\Delta n = -1$, so $K_p = K_c(RT)^{-1} = 4/(0.0821\times300) \approx 0.16$...

Read Full Step-by-Step Solution →

Question #45

Practice Question

Concept Applied

With the common ion \(\ce{Cl^-}\) from NaCl, \([\ce{Cl^-}] \approx 0.010\ \text{M}\). Using \(K_{sp}= [\ce{Ag^+}][\ce{Cl^-}]\), we get \([\ce{Ag^+}] =...

Read Full Step-by-Step Solution →

Question #46

Practice Question

A.5.76
B.3.76
C.4.76
D.6.76

Concept Applied

$pH = 4.76 + \log(10) = 5.76$....

Read Full Step-by-Step Solution →

Question #47

Practice Question

A.Theoretical foundations
B.Practical applications
C.Experimental data
D.Historical context

Concept Applied

Foundational check for Equilibrium. Study the core principles carefully for competitive exams....

Read Full Step-by-Step Solution →

Question #48

Practice Question

A.0.25 atm
B.0.5 atm
C.0.75 atm
D.1.0 atm

Concept Applied

The equilibrium constant expression for the reaction is Kp = (PCO2) / (PCO). Using the given Kp value and initial pressure of CO, we can calculate the...

Read Full Step-by-Step Solution →

Question #49

Practice Question

A.$\frac{P_{NH_3}^2}{P_{N_2} P_{H_2}^3}$
B.$\frac{P_{N_2} P_{H_2}^3}{P_{NH_3}^2}$
C.$\frac{2P_{NH_3}}{P_{N_2} \cdot 3P_{H_2}}$
D.$\frac{P_{NH_3}}{P_{N_2} P_{H_2}}$

Concept Applied

$K_p$ = (partial pressures of products)^stoich / (reactants)^stoich...

Read Full Step-by-Step Solution →

Question #50

Practice Question

Concept Applied

Using the Henderson–Hasselbalch equation: $\text{pH}=\text{p}K_a+\log\frac{[A^-]}{[HA]} = 4.76+\log\frac{0.10}{0.20}=4.76+\log0.5 = 4.76-0.301 = 4.459...

Read Full Step-by-Step Solution →
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