CBSE Class 11 Chemistry MCQs - Chemical Thermodynamics CBSE and NCERT students can refer to the attached file. All educational material on the website has been prepared by the best teachers having more than 20 years of teaching experience in various schools. The study material available on our website for all CBSE classes and subjects have been prepared by teachers from all over the country. All study material has been carefully designed keeping into mind the latest CBSE examination trends.
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
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