Practice Class 11 Chemistry MCQ Questions of Equilibrium with Answers consistently and score well in examinations. We have gathered the NCERT MCQ Questions for Class 11 Chemistry with Answers covering all topics of the syllabus. Refer to the Equilibrium Class 11 MCQ Questions with Answers here alongside a definite clarification. Practice MCQ Questions, it makes you feel confident in answering the question in the exam & increases your scores to high.
Chemical equilibrium relates to such a state when the reactants, as well as products, will no longer undergo any further change. In such a case, the rate of forwarding and backward reaction remains the same. The concept of equilibrium becomes important for students to grasp advanced topics. Class 11 Chemistry equilibrium MCQ Questions provide a clear discussion on it.
Practice MCQ Questions for class 11 Chemistry Chapter-Wise
1. Which of the following aqueous solutions will have highest pH?
(a) NaCl
(b) CH3COONa
(c) Na2CO3
(d) NH4Cl
2. Which of the following oxides is not expected to react with sodium hydroxide?
(a) CaO
(b) SiO2
(c) BeO
(d) B2O3
3. The pH of a 10-10 M NaOH solution is nearest to
(a) 10
(b) 7
(c) 4
(d) -10
4. In a reversible chemical reaction at equilibrium, if the concentration of any one of the reactants is doubled, then the equilibrium constant will
(a) Also be Doubled
(b) Be Halved
(c) Remain the Same
(d) Become One-Fourth
5. When a neutral atom undergoes oxidation, the atoms oxidation state
(a) Decreases as it gains electrons
(b) Decreases as it loses electrons
(c) Increases as it gains electrons
(d) Increases as it loses electrons
6. Among the following the weakest Bronsted base is
(a) F–
(b) Cl–
(c) Br–
(d) I–
7. Among the following hydroxides, the one which has the lowest value of Ksp at ordinary temperature (about 25° C ) is
(a) Mg (OH)2
(b) Ca(OH)2
(c) Ba(OH)2
(d) Be(OH)2
8. Amines behave as
(a) Lewis Acids
(b) Lewis Base
(c) Aprotic Acid
(d) Neutral Compound
9. Which of the following is not a general characteristic of equilibria involving physical processes?
(a) All the physical processes stop at equilibrium
(b) The opposing processes occur at the same rate and there is dynamic but stable condition
(c) All measurable properties of the system remain constant
(d) Equilibrium is possible only in a (closed system at a given temperature
10. Boiling point of the liquid depends on the atmospheric pressure. It depends on the altitude of the place; at high altitude the boiling point…………..
(a) decreases
(b) increases
(c) either decreases or increases
(d) remains same
11. Reaction is said to be in equilibrium when
(a) the rate of transformation of reactant to products is equal to the rate of transformation of products to the reactants.
(b) 50% of the reactants are converted to products
(c) the volume of reactants is just equal to the volume of the products
(d) the reaction is near completion and all the reactants are converted to products
12. Which of the following is not true about a reversible reaction?
(a) Number of moles of reactants and products is always equal
(b) It can be attained only in a closed container
(c) It cannot be influenced by a catalyst
(d) The reaction does not proceed to completion
13. If a system is at equilibrium, the rate of forward to the reverse reaction is
(a) equal
(b) less
(c) high
(d) at equilibrium
14. On doubling P and V with constant temperature the equilibrium constant will
(a) remain constant
(b) become one-fourth
(c) become double
(d) None of these
15. Suitable conditions for melting of ice
(a) high temperature and high pressure
(b) high temperature and low pressure
(c) low temperature and low pressure
(d) low temperature and high pressure
16. What happens when an inert gas is added to an equilibrium keeping volume unchanged?
(a) More product will form
(b) Less product will form
(c) More reactant will form
(d) Equilibrium will remain unchanged
17. Which of the following statement(s) about the Arrhenius equation is incorrect?
(a) If Ea = 0,then k = A
(b) When the activation energy of the reaction is high, the rate becomes independent of temperature.
(c) Two reactions having same value of Ea do not necessarily have same rate.
(d) A reaction with higher value of Ea will have smaller value of rate constant.
18. A base, as defined by Bronsted theory, is a substance which can
(a) accept protons
(b) gain a pair of electrons
(c) donate protons
(d) lose a pair of electrons
19. Which among the following salt solutions is basic in nature?
(a) Ammonium chloride
(b) Ammonium sulphate
(c) Ammonium nitrate
(d) Sodium acetate
20. The pH of 0.01 M NaOH (aq) solution will be-
(a) 7.01
(b) 2
(c) 12
(d) 9
21. Boric acid is an acid because its molecule
(a) contains replaceable H+ ion
(b) gives up a proton
(c) accepts OH- from water releasing proton
(d) combines with proton from water molecule
22. Which of the following fluoro-compounds is most likely to behave as a Lewis base?
(a) BF3
(b) PF3
(c) CF4
(d) SiF4
23. Among the following, the correct order of acidity is
(a) HClO < HClO2 < HClO3 < HClO4
(b) HClO2 < HClO < HClO3 < HClO4
(c) HClO4 < HClO2 < HClO < HClO3
(d) HClO3 < HClO4 < HClO2 < HClO
24. Consider the nitration of benzene using mixed conc. H2SO4 and HNO3. If a large amount of KHSO4 is added to the mixture, the rate of nitration will be
(a) slower
(b) unchanged
(c) doubled
(d) faster
25. Aqueous solution of which of the following compounds is the best conductor of electric current?
(a) Ammonia, NH3
(b) Fructose,C6H12O6
(c) Acetic acid, C2H4O2
(d) Hydrochloric acid, HCl