Equilibrium Important Questions for NEET 2025 PDF Download

1.  [Ag⁺]² [CrO₄²⁻]
2.  [Ag⁺] [CrO₄²⁻]
3.  [2Ag⁺] [CrO₄²⁻]
4. [2Ag⁺]² [CrO₄²⁻]

Q2 Calculate the pOH of a solution at 25°C that contains 1 × 10⁻¹⁰ M of hydronium ions, i.e. H₃O⁺.

1. 1.000
2. 7.000
3. 4.000
4. 9.000

Q3 A reversible reaction having two reactants in equilibrium if the concentration of reactants are doubled, the equilibrium constant will

1. Become 4 times
2. Become 1/4 times
3. Become 1/16 times
4. Remains the same

Q4 When 0.1 mole of ammonia is dissolved in sufficient water to make 1 litre of solution. The solution is found to have a hydroxide ion concentration of 1.34 × 10⁻³. The dissociation constant of ammonia is:

1. 1.8 × 10⁻⁵
2. 1.6 × 10⁻⁶
3. 1.34 × 10⁻³
4. 1.8 × 10⁻⁴

Q5 Consider the following reaction:
PCl₅ (g) ⇌ PCl₃ (g) + Cl₂ (g). The addition of an inert gas at constant volume:

1. Will shift the equilibrium to the right
2. Will shift the equilibrium to the left
3. The equilibrium will remain unchanged
4. Will explode the reaction

Q6 The standard Gibbs energy change at 300 K for the reaction 2 A ⇌ B + C is 2494.2 J. At a given time, the composition of the reaction mixture is [A] = ½, [B] = 2 and [C] = ½. The reaction proceeds in the :
[Rₜ = 8.314 J/Kmol, e = 2.718]

1. Forward direction because Q > Kc
2. Reverse direction because Q > Kc
3. Forward direction because Q < Kc
4. Reverse direction because Q < Kc

Q7 The equilibrium constant of a reaction is 300, if the volume of the reaction flask is tripled, the equilibrium constant will be:

1. 100
2. 300
3. 250
4. 150

Q8 Suitable conditions for melting of ice :

1. High temperature and high pressure.
2.  High temperature and low pressure.
3. Low temperature and low pressure.
4. Low temperature and high pressure.

Q9 The Ksp for Cr(OH)₃ is 1.6 × 10⁻³⁰. The solubility of this compound in water is :

1.  √(1.6 × 10⁻³⁰)
2.  ⁴√(1.6 × 10⁻³⁰/27)
3. 1.6 × 10⁻³⁰/27
4. 1.6 × 10⁻³⁰