JEE Main Chemical Equilibrium Practice Questions With Solutions

Updated By Diksha Sharma on 07 Jan, 2025 21:16

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JEE Main Chemistry Chemical Equilibrium Practice Questions

Question 1.

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For the given hypothetical reactions, the equilibrium constants are as follows :

XY;K1=1.0YZ;K2=2.0ZW;K3=4.0

The equilibrium constant for the reaction XW is

Question 2.

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The ratio KPKC for the reaction :

CO(g)+12O2(g)CO2(g) is :

Question 3.

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At 20C and 1atm pressure, a cylinder is filled with equal number of H2,I2 and HI molecules for the reactionH2(g)+I2(g)2HI(g), the Kp for the process is x×101.

x= __________.

[Given : R=0.082LatmK1mol1]

Question 4.

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Given below are two statements :

Statement I : On passing HCl(g) through a saturated solution of BaCl2, at room temperature white turbidity appears.

Statement II : When HCl gas is passed through a saturated solution of NaCl, sodium chloride is precipitated due to common ion effect.

In the light of the above statements, choose the most appropriate answer from the options given below :

Question 5.

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The following reaction occurs in the Blast furnance where iron ore is reduced to iron metal

Fe2O3(s)+3CO(g)Fe(j)+3CO2(g)

Using the Le-chatelier's principle, predict which one of the following will not disturb the equilibrium.

Question 6.

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The equilibrium constant for the reaction

SO3(g)SO2(g)+12O2(g)

is Kc=4.9×102. The value of Kc for the reaction given below is 2SO2(g)+O2(g)2SO3(g) is :

Question 7.

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A(g)B(g)+C2(g) The correct relationship between KP,α and equilibrium pressure P is

Question 8.

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For the given reaction, choose the correct expression of KC from the following :-

Fe(aq)3++SCN(aq)(FeSCN)(aq)2+

Question 9.

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For a concentrated solution of a weak electrolyte (Keq = equilibrium constant) A2B3 of concentration 'c', the degree of dissociation 'α' is :

Question 10.

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The effect of addition of helium gas to the following reaction in equilibrium state, is :

PCl5(g)PCl3(g)+Cl2(g)

Great Job! continue working on more practice questions?

Question 1.

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The equilibrium constant for the reversible reaction

2A(g) 2B(g) + C(g) is K1

32A(g) 32B(g) + 34C(g) is K2.

K1 and K2 are related as :

Question 2.

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4.0 moles of argon and 5.0 moles of PCl5 are introduced into an evacuated flask of 100 litre capacity at 610 K. The system is allowed to equilibrate. At equilibrium, the total pressure of mixture was found to be 6.0 atm. The Kp for the reaction is :

[Given : R = 0.082 L atm K1 mol1]

Question 3.

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For a reaction at equilibrium

A(g) B(g) + 12 C(g)

the relation between dissociation constant (K), degree of dissociation (α) and equilibrium pressure (p) is given by :

Question 4.

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The value of KC is 64 at 800 K for the reaction

N2(g) + 3H2(g) ⇌ 2NH3(g)

The value of KC for the following reaction is :

NH3(g) ⇌ 12N2(g) + 32H2(g)

Question 5.

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The variation of equilibrium constant withtemperature is given below :

TemperatureEquilibrium Constant
T1 = 25oCK1 = 10
T2 = 100oCK2 = 100

The values of ΔHo, ΔGo at
T1 and ΔGo at T2(in kJ mol–1) respectively, are close to :
[UseR = 8.314 J K–1 mol–1]

Question 6.

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For the reaction

Fe2N(s) + 32H2(g) ⇌ 2Fe(s) + NH3(g)

Question 7.

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Consider the following reaction:

N2O4(g) ⇌ 2NO2(g); ΔHo = +58 kJ

For each of the following cases (a, b), the direction in which the equilibrium shifts is :
(a) Temperature is decreased.
(b) Pressure is increased by adding N2 at constant T.

Question 8.

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

Question 9.

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For the equilibrium A ⇌ B , the variation of therate of the forward (a) and reverse (b) reactionwith time is given by :

Question 10.

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

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