MCQ Questions for Class 11 Chemistry Chapter 7 Equilibrium with Answers

Equilibrium Class 11 Chemistry MCQs Questions with Answers

Check the below NCERT MCQ Questions for Class 11 Chemistry Chapter 7 Equilibrium with Answers Pdf free download. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. We have Provided Equilibrium Class 11 Chemistry MCQs Questions with Answers to help students understand the concept very well.

Class 11 Chemistry Chapter 7 Quiz

Class 11 Chemistry Chapter 7 MCQ Online Test

You can refer to NCERT Solutions for Class 11 Chemistry Chapter 7 Equilibrium to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Equilibrium Class 11 Chemistry MCQ online test

Q1.	Which of the following fluoro-compounds is most likely to behave as a Lewis base?
	A.BF₃
	B.PF₃
	C.CF₄
	D.SiF₄

Ans: PF₃

Q2.	Calculate the pOH of a solution at 25°C that contains 1 × 10^-10 M of hydronium ions, i.e. H₃O⁺.
	A.4
	B.9
	C.1
	D.7

Ans: 4

Q3.	When two reactants, A and B are mixed to give products C and D, the reaction quotient, Q, at the initial stages of the reaction
	A.is zero
	B.Decreases With Time
	C.Is Independent Of Time
	D.Increases With Time

Ans: Increases With Time

Q4.	1 M NaCl and 1 M HCl are present in an aqueous solution. The solution is
	A.Not a buffer solution with pH < 7
	B.Not a buffer solution with pH > 7
	C.A buffer solution with pH < 7
	D.A buffer solution with pH > 7

Ans: Not a buffer solution with pH < 7

Q5.	If, in the reaction N₂O₄ 2NO₂, x is that part of N₂O₄ which dissociates, then the number of molecules at equilibrium will be
	A.1
	B.3
	C.(1 + x)
	D.(1 + xy)²

Ans: 1

Q6.	The solubility product of a salt having general formula MX₂. In water is : 4 × 10^-12. The concentration of M²⁺ions in the aqueous solution of the salt is
	A.4.0 × 10^-10 M
	B.1.6 × 10^-4 M
	C.1.0 × 10^-4 M
	D.2.0 × 10^-6 M

Ans: 1.0 × 10^-4 M

Q7.	Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH?
	A.CaCl₂
	B.SrCl₂
	C.BaCl₂
	D.MgCl₂

Ans: BaCl₂

Q8.	Oxidation number of Iodine varies from
	A.-1 to +1
	B.-1 to +7
	C.+3 to +5
	D.-1 to +5

Ans: -1 to +7

Q9.	Which of the following molecualr species has unpaired electrons?
	A.N₂
	B.F₂
	C.O^–₂
	D.O₂^-2

Ans: O^–₂

Q10.	A certain buffer solution contains equal concentration of X^– and HX. The ka for HX is 10^-8. The pH of the buffer is
	A.3
	B.8
	C.11
	D.14

Ans: 8

Q11.	Among the following the weakest Bronsted base is
	A.F^–
	B.Cl^–
	C.Br^–
	D.I^–

Ans: I^–

Q12.	Which of the following statements is correct about the equilibrium constant?
	A.Its value increases by increase in temperature
	B.Its value decreases by decrease in temperature
	C.Its value may increase or decrease with increase in temperature
	D.Its value is constant at all temperatures

Ans: Its value may increase or decrease with increase in temperature

Q13.	pH value of which one of the following is NOT equal to one?
	A.0.1 M CH₃COOH
	B.0.1 M HNO₃
	C.0.05 M H₂SO₄
	D.50 cm³ 0.4 M HCl + 50 cm³ 0.2 M NaOH

Ans: 0.1 M CH₃COOH

Q14.	[ OH^–] in a solution is 1 mol L^–. The pH the solution is
	A.1
	B.0
	C.14
	D.10^-14

Ans: 14

Q15.	What is the pH of a 0.10 M solution of barium hydroxide, Ba (OH)₂?
	A.11.31
	B.11.7
	C.13.3
	D.None of these

Ans: 13.3

Q16.	The K_sp for Cr (OH)₃ is 1.6 × 10^-30. The molar solubility of this compound in water is:
	A.√ (1.6 × 10^-30)
	B.(√(1.6 × 10^-30))^(1/4)
	C.(√(1.6 × 10^-30)/(27)))^(1/4)
	D.(1.6 × 10^-30)/(27)

Ans: (√(1.6 × 10^-30)/(27)))^(1/4)

Q17.	The solubility product of CuS, Ag₂S and HgS are 10^-31, 10^-44 and 10^-54 respectively. The solubilities of these sulphides are in the order
	A.HgS > Ag₂S > CuS
	B.CuS > Ag₂S > HgS
	C.Ag₂S > CuS > HgS
	D.AgS > HgS > CuS

Ans: Ag₂S > CuS > HgS

Q18.	Buffer solutions have constant acidity and alkalinity because
	A.They have large excess of H⁺ or OH^– ions
	B.They have fixed value of pH
	C.These give unionised acid or base on reaction with added acid or alkali
	D.Acids and alkalies in these solutions are shielded from attack by other ions

Ans: These give unionised acid or base on reaction with added acid or alkali

Q19.	The position of some metals in the electrochemical series in decreasing electropositive character is Mg > Al > Zn > Cu > Ag. In a chemical factory, a worker by accident used a copper rod to stir a solution of aluminium nitrate; he was scared that now there would be some reaction in the solution, so he hurriedly removed the rod from the solution and observed that
	A.The rod was coated with Al
	B.An alloy of Cu and Al was being formed.
	C.The solution turned blue in colour
	D.There was no reaction.

Ans: There was no reaction.

Q20.	An amount of solid NH₄HS is placed in a flask already contaniing ammonia gas at a certain temperature and 0.50 atm pressure. Ammonium hydrogen sulphide decomposes to yield NH₃ and H₂S gases in the flask. When the decomposition reaction reaches equilibrium , the total pressure in the flask rises to 0.84 atm? The equilibrium constant for NH₄HS decomposition at this temperature is
	A.0.11
	B.0.17
	C.0.18
	D.0.3