Practice CBSE Class 11 Chemistry Thermodynamics MCQs Set A provided below. The MCQ Questions for Class 11 Chapter 5 Thermodynamics Chemistry with answers and follow the latest CBSE/ NCERT and KVS patterns. Refer to more Chapter-wise MCQs for CBSE Class 11 Chemistry and also download more latest study material for all subjects
MCQ for Class 11 Chemistry Chapter 5 Thermodynamics
Class 11 Chemistry students should review the 50 questions and answers to strengthen understanding of core concepts in Chapter 5 Thermodynamics
Chapter 5 Thermodynamics MCQ Questions Class 11 Chemistry with Answers
Question: Thermodynamics is not concerned about
a) the rate at which a reaction proceeds
b) the feasibility of a chemical reaction
c) the extent to which a chemical reaction proceeds
d) energy changes involved in a chemical reaction
Answer: the rate at which a reaction proceeds
Question: Which of the following statements is not true regarding the laws of thermodynamics ?
a) It deal with energy changes of microscopic systems
b) It does not depends on the rate at which these energy transformations are carried out.
c) It depends on initial and final states of a system undergoing the change.
d) It deal with energy changes of macroscopic systems
Answer: It deal with energy changes of microscopic systems
Question: A ___________in thermodynamics refers to that part of universe in which observations are made and remaining universe constitutes the ___________
a) system, surroundings
b) system, boundary
c) surroundings, system
d) system, surroundings
Answer: system, surroundings
Question: The universe refers to
a) both system and surroundings
b) None of these
c) only surroundings
d) only system
Answer: both system and surroundings
Question: Which of the following statements is correct?
a) The presence of reactants in a closed vessel made up of copper is an example of a closed system.
b) The presence of reactants in a thermos flask or any other closed insulated vessel is an example of a closed system.
c) There is an exchange of energy as well as matter between the system and the surroundings in a closed system.
d) The presence of reacting species in a covered beaker is an example of open system
Answer: The presence of reactants in a closed vessel made up of copper is an example of a closed system.
Question: Which of the following is closed system ?
a) Pressure cooker
b) Rocket engine during propulsion
c) Tea placed in a steel kettle
d) Jet engine
Answer: Pressure cooker
Question: An isolated system is that system in which
a) There is no exchange of mass or energy with the surroundings
b) There is exchange of mass with the surroundings
c) There is exchange of mass and energy with the surroundings
d) There is no exchange of energy with the surroundings
Answer: There is no exchange of mass or energy with the surroundings
Question: The state of a thermodynamic system is described by its measurable or macroscopic (bulk) properties. These are
a) Pressure, volume, temperature and amount
b) Volume, temperature and amount
c) Pressure and temperature
d) Pressure and volume
Answer: Pressure, volume, temperature and amount
Question: Among the following the state function(s) is (are)
(i) Internal energy
(ii) Irreversible expansion work
(iii) Reversible expansion work
(iv) Molar enthalpy
a) (i) and (iv)
b) (ii) and (iii)
c) (i), (ii) and (iii)
d) (i) only
Answer: (i) and (iv)
Question: ___________ is a quantity which represents the total energy of the system
a) Internal energy
b) Electrical energy
c) Chemical energy
d) Mechanical energy
Answer: Internal energy
Question: Which of the following factors affect the internal energy of the system ?
a) All of the above
b) Matter enters or leaves the system
c) Work is done on or by the system.
d) Heat passes into or out of the system
Answer: All of the above
Question: The system that would not allow exchange of heat between the system and surroundings through its boundary is considered as
a) adiabatic
b) isochoric
c) isobaric
d) isothermal
Answer: adiabatic
Question: The enthalpy change of a reaction does not depend on
a) Different intermediate reactions
b) Initial and final enthalpy change of a reaction
c) Nature of reactants and products
d) The state of reactants and products
Answer: Different intermediate reactions
Question: The q is ____ when heat is transferred from the surroundings to the system and q is ______ When heat is transferred from system to the surroundings
a) positive , negative
b) high, low
c) negative , positive
d) low, high
Answer: positive , negative
Question: Which of the following statements is incorrect?
a) Both
b) q is a path dependent function.
c) H is a state function
d) None of these
Answer: Both
Question: The work done during the expansion of a gas from a volume of 4 dm3 to 6 dm3 against a constant external pressure of 3 atm is (1 L atm = 101.32 J)
a) – 608 J
b) – 304 J
c) – 6 J
d) + 304 J
Answer: – 608 J
Question: During isothermal expansion of an ideal gas, its
a) enthalpy remains unaffected
b) enthalpy reduces to zero.
c) enthalpy decreases
d) internal energy increases
Answer: enthalpy remains unaffected
Question: The enthalpies of elements in their standard states are taken as zero. The enthalpy of formation of a compound
a) may be positive or negative
b) is never negative
c) is always positive
d) is always negative
Answer: may be positive or negative
Question: Among the following, the intensive properties are
(i) molar conductivity (ii) electromotive force
(iii) resistance (iv) heat capacity
a) (ii) and (iii)
b) (i) and (iv)
c) (i), (ii) and (iii)
d) (i) only
Answer: (ii) and (iii)
Question: Which is an extensive property of the system ?
a) Volume
b) Viscosity
c) Temperature
d) Refractive index
Answer: Volume
I. MCQ - Choose Appropriate Alternative
1. The quantity of heat evolved or absorbed during a chemical reaction is called __________. (Heat or Reaction, Heat of Formation, Heat of Combination)
2. An endothermic reaction is one, which occurs __________. (With evolution of heat, With absorption of Heat, In forward Direction)
3. An exothermic reaction is one during which __________. (Heat is liberated, Heat is absorbed, no change of heat occurs)
4. The equation C + O2 → CO2 delta H = -408KJ represents __________ reaction. (Endothermic, Exothermic, Reversible)
5. The equation N2 + O2 → 2NO ΔH = 180KJ represents __________ reaction. (Endothermic, Exothermic, Irreversible)
6. Thermo-chemistry deals with __________. (Thermal Chemistry, Mechanical Energy, Potential Energy)
7. Enthalpy is __________. (Heat content, Internal energy, Potential Energy)
8. Hess’s Law is also known as __________. (Law of conservation of Mass, Law of conservation of Energy, Law of Mass Action)
9. Any thing under examination in the Laboratory is called __________. (Reactant, System, Electrolyte)
10. The environment in which the system is studied in the laboratory is called __________. (Conditions, Surroundings, State)
11. When the bonds being broken are more than those being formed in a chemical reaction, then ΔH will be __________. (Positive, Negative, Zero)
12. When the bond being formed are more than those being broken in a chemical reaction, then the ΔH will be __________. (Positive, Negative, Zero)
13. The enthalpy change when a reaction is completed in single step will be __________ as compared to that when it is completed in more than one steps. (Equal to, Partially different from, Entirely different from)
14. The enthalpy of a system is represent by __________. (H, ΔH, ΔE)
15. The factor E + PV is known as __________. (Heat content, Change in Enthalpy, Work done)
16. Heat of formation is represented by __________. (Δf, ΔHf, Hf)
17. The heat absorbed by the system at constant __________ is completely utilize to increase the internal energy of the system. (Volume, Pressure, Temperature)
18. Heat change at constant __________ from initial to final state is simply equal to the change in enthalpy. (Volume, Pressure, Temperature)
19. A system, which exchange both energy and energy with the surrounding, is __________ system. (Open, Closed, Isolated)
20. A system, which only exchange energy with the surrounding but not the matter, is __________ system. (Open, Closed, Isolated)
II. Fill in the Blank
1. The branch of Chemistry, which deals with the heat changes that take place during chemical reaction, is called __________.
2. The branch of science which deals with energy changes accompanying physical and chemical transformation is called __________.
3. The amount of heat evolved or absorbed in a chemical reaction is called __________.
4. Such reactions in which heat is evolved are called __________ reactions.
5. Such reactions in which heat is absorbed are called __________ reactions.
6. In exothermic reactions, heat evolved is given by __________ sign of DH.
7. In endothermic reactions heat absorbed is given by __________ sign of DH.
8. The total heat change in a reaction is the same whether it takes place in one or several steps.
9. The first law of thermodynamics is also known as __________.
10. The part of universe under observation is called __________.
11. The system plus its surrounding is called __________.
12. Such properties, which give description of a system at a particular moment.
13. The term E + PV is called __________.
14. DH represents change in __________.
15. The temperature of water is raised up when sulphuric acid is added to it. This is an __________ reaction.
16. The characteristic properties of a system which is independent of amount of material concerned is called __________ properties.
17. The characteristic properties of a system which depend on amount of substance present in it is called __________ properties.
18. Density, pressure and temperature are the examples of __________ properties.
19. Mole numbers and enthalpy are the examples of __________ properties.
20. A system, which exchange both energy and matter with its surrounding, is called __________ system.
21. A system, which only exchange energy with the surrounding but not matter is, called __________ system.
22. A system which neither exchange energy nor matter with its surrounding is called __________ system.
23. A system is __________ if it contains only one phase.
24. A system is __________ if it contains more than one phase.
25. 1 kilojoule is equal to __________ joules.
26. 1 Calorie is equal to __________ joules.
27. 1 kilo calorie is equal to __________ joules.
28. The work done (w) is mathematically denoted by __________.
29. The change in enthalpy is denoted by __________.
30. __________ law is used in calculating heat of reaction.
31. __________ is defined as the change in enthalpy when one gram mole of a compound is produced from its element.
32. Heat of formation is denoted by __________.
33. When the work is done on the system by the surrounding the sign of work done (w) is __________.
34. When the work is done by the system on surrounding the sign of work done is __________.
35. First law of Thermodynamics is mathematically represented as __________.
36. Standard enthalpies are measured at __________.
37. Hess’s Law is employed to calculate __________ of a chemical reaction.
38. Heat absorbed by the system at constant volume is completely utilize to increase the __________ of the system.
39. Heat change at constant pressure from initial to final state of the system is simply equal to the __________.
40. SI unit of measurement of heat change is __________.
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Important Practice Resources for Class 11 Chemistry
MCQs for Chapter 5 Thermodynamics Chemistry Class 11
Students can use these MCQs for Chapter 5 Thermodynamics to quickly test their knowledge of the chapter. These multiple-choice questions have been designed as per the latest syllabus for Class 11 Chemistry released by CBSE. Our expert teachers suggest that you should practice daily and solving these objective questions of Chapter 5 Thermodynamics to understand the important concepts and better marks in your school tests.
Chapter 5 Thermodynamics NCERT Based Objective Questions
Our expert teachers have designed these Chemistry MCQs based on the official NCERT book for Class 11. We have identified all questions from the most important topics that are always asked in exams. After solving these, please compare your choices with our provided answers. For better understanding of Chapter 5 Thermodynamics, you should also refer to our NCERT solutions for Class 11 Chemistry created by our team.
Online Practice and Revision for Chapter 5 Thermodynamics Chemistry
To prepare for your exams you should also take the Class 11 Chemistry MCQ Test for this chapter on our website. This will help you improve your speed and accuracy and its also free for you. Regular revision of these Chemistry topics will make you an expert in all important chapters of your course.
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