This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 21 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Specific heat of water is 4.18 J g$^{-1 }$$^\circ$C$^{-1}$. Specific heat of wood is 1.760 J g$^{-1 }$$^\circ$C$^{-1}$ What material needs more heat energy to raise the temperature? A) Water. B) Wood. C) Both are same. D) None of the above. Show Answer Correct Answer: A) Water. 2. Hess's law is also known as A) Law of conservation of mass. B) Law of conservation of energy. C) Law of mass action. D) None of these. Show Answer Correct Answer: B) Law of conservation of energy. 3. ..... is intensive variable A) Area. B) Entropy. C) Temperature. D) Volume. Show Answer Correct Answer: C) Temperature. 4. What does entropy primarily measure in a system? A) The total energy content. B) The temperature of the system. C) The amount of available energy for work. D) The degree of disorder or randomness. Show Answer Correct Answer: D) The degree of disorder or randomness. 5. A heat engine absorbs heat Q$_{1}$ at temperature T$_{1}$ and heat Q$_{2}$ at temperature T$_{2}$. The work done by the engine is J (Q$_{1}$ + Q$_{2}$). This data A) Violates 1$^{st}$ law of thermodynamics. B) Violates 1$^{st}$ law of thermodynamics if Q$_{1}$ is-ve. C) Violates 1$^{st }$law of thermodynamics if Q$_{2}$ is-ve. D) Does not violate the 1$^{st}$ law of thermodynamics. Show Answer Correct Answer: D) Does not violate the 1$^{st}$ law of thermodynamics. 6. A concept that addresses entropy A) 1st law of thermodynamics. B) 2nd law of thermodynamics. C) 3rd law of thermodynamics. D) None of the above. Show Answer Correct Answer: B) 2nd law of thermodynamics. 7. When work is done on system or by a system there is a change in ..... A) External energy. B) Internal energy. C) Adiabatic energy. D) Isothermal energy. Show Answer Correct Answer: B) Internal energy. 8. 1 mole of helium gas is heated from a temperature of 300 K to 600 K. Calculate the entropy change if a) Volume is kept constantb) Pressure is kept constant A) 14.4 Jk$^{-1}$mol-1 and 8.6 Jk$^{-1}$mol-1. B) 2.4 Jk$^{-1}$mol-1 and 8.6 Jk$^{-1}$mol-1. C) 8.6 Jk$^{-1}$mol-1 and 14.4 Jk$^{-1}$mol-1. D) 14.4 Jk$^{-1}$mol-1 and 6.6 Jk$^{-1}$mol-1. Show Answer Correct Answer: C) 8.6 Jk$^{-1}$mol-1 and 14.4 Jk$^{-1}$mol-1. 9. Heat transferred by electromagnetic waves is: A) Conduction. B) Convention. C) Radiation. D) How the Hulk got his powers. Show Answer Correct Answer: C) Radiation. 10. States that energy spontaneously spreads from higher concentrations to regions of lower concentrations. A) 1st Law of Thermodynamics. B) 2nd law of thermodynamics. C) Themal insulator. D) Heat engine. E) Thermodynamics. Show Answer Correct Answer: B) 2nd law of thermodynamics. 11. When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases. What kind of reaction is this? A) Endothermic. B) Decomposition. C) Exothermic. D) Indothermic. Show Answer Correct Answer: A) Endothermic. 12. One mole of which of the following has the highest entropy? A) Liquid nitrogen. B) Hydrogen gas. C) Mercury. D) Diamond. Show Answer Correct Answer: B) Hydrogen gas. 13. What quantity of heat is required to raise the temperature of 450 grams of water from 15$^\circ$C to 85$^\circ$C? The specific heat capacity of water is 4.18 J/g/$^\circ$C. A) 131670 J. B) 159885 J. C) -131670. D) None of the above. Show Answer Correct Answer: A) 131670 J. 14. Approximate values of the average bond enthalpies, in kJ/mol, of three substances are:H-H = 430, F-F = 155, H-F = 565What is the enthalpy change in kJ for this reaction:2HF $\rightarrow$ H$_{2}$ + F$_{2}$ A) +545. B) +2. C) -20. D) -545. Show Answer Correct Answer: A) +545. 15. Kelvin plank law deal about ..... A) Conservation of heat. B) Conservation of work. C) Conservation of heat into work. D) Conservation of work into heat. Show Answer Correct Answer: C) Conservation of heat into work. 16. Which thermodynamic function accounts automatically for enthalpy and entropy both? A) Helmholtz Free Energy (A). B) Internal Energy (E). C) Work Function. D) Gibbs Free Energy. Show Answer Correct Answer: D) Gibbs Free Energy. 17. Two objects at different temperatures are in contact. Which of the following happens to their thermal energy? A) Their thermal energies remain the same. B) Thermal energy passes from the cooler object to the warmer object. C) Thermal energy passes from the warmer object to the cooler object. D) Thermal energy passes back and forth equally between the two objects. Show Answer Correct Answer: C) Thermal energy passes from the warmer object to the cooler object. 18. Insulator A) A material the energy does NOT transfer through easily. B) A material that thermal energy travels through easily. C) The measure of the kinetic energy of an object's molecules. D) None of the above. Show Answer Correct Answer: A) A material the energy does NOT transfer through easily. 19. The processes or systems that do not involve heat are called A) Isothermal processes. B) Equilibrium processes. C) Thermal processes. D) Steady processess. E) Adiabatic processe. Show Answer Correct Answer: E) Adiabatic processe. 20. If a system takes heat of 100 J and 100 J work is done on the system . The change in internal energy is A) 0. B) 200. C) 100. D) None of the above. Show Answer Correct Answer: B) 200. 21. Atom A) The smallest unit of an element that has all of the properties of that element; contains a nucleus with a surrounding electron cloud. B) The transfer of thermal energy through currents in fluids. C) The emission or transmission of energy as particles or waves. D) The hotness or coldness of matter as related to the average kinetic energy of the molecules of that substance. Show Answer Correct Answer: A) The smallest unit of an element that has all of the properties of that element; contains a nucleus with a surrounding electron cloud. 22. Which is the incorrect statement about Carnot cycle? A) It is used as the alternate standard of comparison of all heat engines. B) All the heat engines are based on Carnot cycle. C) It provides concept of maximising work output between the two temperature limits. D) All of the above. Show Answer Correct Answer: B) All the heat engines are based on Carnot cycle. 23. An electrical heater supplies heat to a system at a rate of 100W. The system performs work at a rate of 75 joule per second. At what rate is the internal energy increasing? A) 75W. B) 25W. C) 100W. D) No Change. Show Answer Correct Answer: B) 25W. 24. When work is dissipated into internal energy, what is the change in the disorderly motion of molecules. A) Increases. B) Remains the same. C) Decreases. D) None of the mentioned. Show Answer Correct Answer: A) Increases. 25. An isobaric process is one in which: A) Volume remains constant. B) Entropy remains constant. C) Pressure remains constant. D) Temperature remains constant. Show Answer Correct Answer: C) Pressure remains constant. ← PreviousNext →Related QuizzesClass 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 1Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 2Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 3Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 4Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 5Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 6Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 7Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 8Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 9Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books