In This Post we are providing Chapter-7 Equilibrium NCERT MCQ for Class 11 Chemistry which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.
NCERT MCQ ON EQUILIBRIUM
Question 1: The liquid which has a ____ vapour pressure is more volatile and has a_____boiling point.
- a) Higher, lower
- b) Higher , higher
- c) Lower, lower
- d) Lower, higher
Answer: Higher, lower
Question 2: 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
Answer: decreases
Question 3: In an experiment three watch glasses containing separately 1mL each of acetone, ethyl alcohol, and water are exposed to atmosphere and the experiment with different volumes of the liquids in a warmer room is repeated, it is observed that in all such cases the liquid eventually disappears and the time taken for complete evaporation in each case was different. The possible reason is/are
- a) All of the above
- b) the temperature is different
- c) the amount of the liquids is different
- d) the nature of the liquids is different
Answer: All of the above
Question 4: A small amount of acetone is taken in a watch glass and it is kept open in atmosphere. Which statement is correct for the given experiment?
- a) The rate of condensation from vapour to liquid state is much less than the rate of evaporation
- b) The rate of condensation from vapour to liquid state is equal or less than the rate of evaporation.
- c) The rate of condensation from vapour to liquid state is equal to the rate of evaporation
- d) None of these
Answer: The rate of condensation from vapour to liquid state is much less than the rate of evaporation
Question 5: 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
Answer: the rate of transformation of reactant to products is equal to the rate of transformation of products to the reactants.
Question 6: 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
Answer: Number of moles of reactants and products is always equal
Question 7: If a system is at equilibrium, the rate of forward to the reverse reaction is
- a) equal
- b) less
- c) high
- d) at equilibrium
Answer: equal
Question 8: In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled then the equilibrium constant will
- a) Remain the same
- b) Be halved
- c) Also be doubled
- d) Become one-fourth
Answer: Remain the same
Question 9: Which one of the following information can be obtained on the basis of Le Chatelier principle?
- a) Shift in equilibrium position on changing value of a constraint
- b) Equilibrium constant of a chemical reaction
- c) Entropy change in a reaction
- d) Dissociation constant of a weak acid
Answer: Shift in equilibrium position on changing value of a constraint
Question 10: 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
Answer: high temperature and high pressure
Question 11: In an equilibrium reaction if temperature increases
- a) any of the above
- b) no effect
- c) equilibrium constant decreases
- d) equilibrium constant increases
Answer: any of the above
Question 12: 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
Answer: More product will form
Question 13: Which of the following is/are electrolytes?
(i) Sugar solution (ii) Sodium chloride
(iii) Acetic acid (iv) Starch solution
- a) (ii) and (iii)
- b) (i) and (iv)
- c) (ii) and (iv)
- d) (i) and (iii)
Answer: (ii) and (iii)
Question 14: Which of the following statements are correct regarding Arrhenius theory of acid and base?
- a) Both
- b) This theory was applicable to only aqueous solutions
- c) This theory was applicable to all solutions
- d) None of these
Answer: Both
Question 15: Would gaseous HCl be considered as an Arrhenius acid ?
- a) No
- b) Yes
- c) Not known
- d) Gaseous HCl does not exist
Answer: No
Discover more from EduGrown School
Subscribe to get the latest posts sent to your email.