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Equilibrium Questions

Practice 47 Equilibrium questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

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47
Total Questions
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13
Easy
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28
Medium
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6
Hard
Practice by Exam:Chemistry(38)Physics(6)CHEMISTRY(2)General Studies(1)

About Equilibrium — practice questions, PYQs & concepts

Equilibrium is a frequently-tested topic on Chemistry, Physics, CHEMISTRY. ExamTest.live currently lists 47 Equilibrium questions spanning previous-year papers from 2026 to 2026, each with worked solutions and a step-by-step explanation. Use the filters on this page to focus on a specific exam, difficulty level or year — every answer key is free, no sign-up required.

Equilibrium weight in competitive exams

Across our Equilibrium question bank, the largest sources are Chemistry (38), Physics (6), CHEMISTRY (2) and General Studies (1). Click any exam chip above to drill down to that exam-specific question set.

How to use this page

  • Start easy: 13 easy Equilibrium questions are available — build fluency before moving up.
  • Target weak years: Use the year filter to focus on the most recent 2026 paper or older PYQs you have not attempted.
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All Equilibrium Questions(1–47 of 47)

Filter:
Q1mediummcqChemistryAIEEE2026
0% accuracy
The solubility product of a salt having general formula , in water is . The concentration of ions in the aqueous solution of the salt is:
Q2easymcqChemistryAIEEE2026
0% accuracy
The exothermic formation of is represented by the equation:

Which of the following will increase the quantity of in an equilibrium mixture?
Q3easymcqPhysicsAIEEE 20042026
0% accuracy
A charged oil drop is suspended in a uniform field of so that it neither falls nor rises. The charge on the drop will be: (Take mass of the drop and )
Q4easymcqChemistryAIEEE2026
0% accuracy
Hydrogen ion concentration in in a solution of will be:
Q5easymcqChemistryAIEEE2026
0% accuracy
What is the conjugate base of ?
Q6hardmcqChemistryAIEEE2026
0% accuracy
Solid is placed in a flask containing at . It decomposes into and . At equilibrium, total pressure is . is:
Q7mediummcqChemistryAIEEE2026
0% accuracy
For the reaction: , it is found that at , . When and are compared at this temperature, it is found that:
Q8mediummcqChemistryNEET 20192026
0% accuracy
pH of a saturated solution of Ca(OH)
2
​
is 9. The solubility product (K
sp
​
) of Ca(OH)
2
​
is:
Q9easymcqChemistryNEET 20192026
0% accuracy
Conjugate base for Brønsted acids H
2
​
O and HF are:
Q10mediummcqPhysicsAIEEE 20062026
0% accuracy
A mass of is suspended by a weightless string. The horizontal force that is required to displace it until the string makes an angle of with the initial vertical direction is:
Q11mediummcqChemistryNEET 20192026
0% accuracy
Which will make basic buffer?
Q12hardmcqChemistryNEET 20192026
0% accuracy
For a cell involving one electron E
cell
∘
​
=0.59V at 298K, the equilibrium constant for the cell reaction is:
Q13hardmcqChemistryNEET (UG) 20172026
0% accuracy
Concentration of the ions in a saturated solution of is . Solubility product of is:
Q14easymcqPhysicsAIEEE 20032026
A horizontal force of is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is . The weight of the block is:
image
Q15hardmcqChemistryNEET (UG) 20242026
Consider the following reaction in a sealed vessel at equilibrium with concentrations: , , and . If of is taken in a closed vessel, what will be the degree of dissociation () of at equilibrium?
Q16mediummcqCHEMISTRYNEET 20192026
The molar solubility of () in solution of will be:
Q17hardmcqChemistryAIEEE 20042026
The molar solubility product of a salt is . The solubility ' ' is given in terms of by the relation:
Q18easymcqChemistryAIEEE 20042026
The conjugate base of is:
Q19easymcqChemistryAIEEE 20042026
For the reaction, the is equal to:
Q20mediummcqChemistryAIEEE 20042026
The equilibrium constant for the reaction at temperature is . The value of for the reaction at the same temperature is:
Q21easymcqChemistryAIEEE 20042026
What is the equilibrium expression for the reaction ?
Q22mediummcqChemistryAIEEE2026
At , the solubility product of is . At which pH, will ions start precipitating in the form of from a solution of ions?
Q23mediummcqChemistryAIEEE2026
Solubility product of silver bromide is . The quantity of potassium bromide (molar mass taken as ) to be added to of solution of silver nitrate to start the precipitation of is:
Q24mediummcqChemistryAIEEE2026
Three reactions involving are given below:(i) (ii) (iii) (Inconsistent stoichiometry)In which of the above does act as an acid?
Q25mediummcqChemistryAIEEE2026
In aqueous solution the ionization constants for carbonic acid are and . Select the correct statement for a saturated solution of the carbonic acid.
Q26mediummcqGeneral StudiesCompetitive Exams2026
An aqueous solution of iron(III) chloride () is found to be:
Q27mediummcqChemistryNEET 2020 E12026
Find out the solubility of in . Given that the ionic product of is .
Q28easymcqCHEMISTRYNEET 20192026
Which of the following cannot act both as a Bronsted acid and as a Bronsted base?
Q29mediummcqPhysicsNEET 20212026
A uniform rod of length and mass is balanced on a wedge placed at mark. A mass of is suspended from the rod at and another unknown mass is suspended from the rod at mark. Find the value of such that the rod is in equilibrium. ()
image
Q30mediummcqChemistryNEET (UG) 20182026
The solubility of in water is at . The value of its solubility product () will be (Given molar mass ):
Q31mediummcqChemistryChemistry
0% accuracy
A buffer solution is prepared in which the concentration of is and the concentration of is . If the equilibrium constant, for equals , what is the pH of this solution?
Q32mediummcqChemistryChemistry
0% accuracy
For the reaction , the equilibrium constant is . The equilibrium constant is for the reaction . What is for the reaction ?
Q33mediummcqChemistryChemistry
0% accuracy
The value of for the reaction is less than zero. Formation of will be favoured at:
Q34mediummcqChemistryChemistry
0% accuracy
Which of the following is least likely to behave as a Lewis base?
Q35mediummcqChemistryChemistry
0% accuracy
If the for a given reaction has a negative value, then which of the following gives the correct relationships for the values of and ?
Q36mediummcqChemistryChemistry
0% accuracy
A weak acid, , has a of . If of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to:
Q37easymcqChemistryChemistry
Which of the following pairs constitutes a buffer?
Q38hardmcqChemistryChemistry
The hydrogen ion concentration of a aqueous solution at () is :
Q39mediummcqChemistryChemistry
Standard entropies of and are and respectively. For the reaction to be at equilibrium, the temperature should be:
Q40mediummcqChemistryChemistry
A solution contains and at . Aqueous is added until . What are the concentrations of and at equilibrium? ( for , for )
Q41mediummcqChemistryChemistry
Buffer solutions have constant acidity and alkalinity because:
Q42mediummcqPhysicsPhysics
is an equilateral triangle with as its centre. and represent three forces acting along the sides and respectively. If the total torque about is zero then the magnitude of is:
image
Q43mediummcqPhysicsPhysics
The potential energy of a particle in a force field is , where and are positive constants and is the distance of particle from the centre. For stable equilibrium the distance of the particle is:
Q44mediummcqChemistryChemistry
Which of the following salts will give highest in water?
Q45easymcqChemistryChemistry
For the reversible reaction: , the equilibrium shifts in the forward direction:
Q46easymcqChemistryChemistry
For a given exothermic reaction, and are the equilibrium constants at temperatures and , respectively. Assuming that the heat of reaction is constant in the temperature range between and , and , it is observed that:
Q47mediummcqChemistryChemistry
For the reaction, Which of the following statements is not true?

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