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Chapter No 9 : Second Law of Thermodynamics (83 MCQ`S)

mcqs on Second Law of Thermodynamics , Multiple choice questions on second Law of Thermodynamics PDF, Thermodynamics Exam Questions and answers with explanation, thermodynamics exam questions and answers pdf, Second law of thermodynamics exercises, What is the second law of thermodynamics example question & Answers with explanation

  1. The tendency of a process to occur naturally is known as:
    1. spontaneity of the reaction
    2. momentum of the reaction
    3. equilibrium of the reaction
    4. none of these
      5. Show Answer
      Answer: A
      Explanation:
      • N/A
  2. Example of a spontaneous process is:
    1. heat flow
    2. cliff jumping
    3. gas flow
    4. all of these
      5. Show Answer
      Answer: D
      Explanation:
      • N/A
  3. Which is true about the criteria of spontaneity?
    1. for a spontaneous change to occur, time is no factor
    2. a spontaneous change is unidirectional
    3. if the system is not in equilibrium state, a spontaneous change is invitable
    4. all of these
      5. Show Answer
      Answer: D
      Explanation:
      • N/A
  4. A spontaneous change is accompanied by:
    1. decrease of internal energy only
    2. decrease of internal energy or enthalpy
    3. increase or decrease of internal energy
    4. neither increase nor decrease of internal energy
      5. Show Answer
      Answer: B
      Explanation:
      • N/A
  5. The example of endothermic process which proceeds spontaneously is:
    1. evaporation of rain water
    2. melting of ice
    3. both a and b
    4. mixing of two gases
      5. Show Answer
      Answer: C
      Explanation:
      • N/A
  6. Entropy is a measure of the ----- of the system:
    1. velocity
    2. randomness or disorder
    3. degree of the order
    4. zig-zag motion
      5. Show Answer
      Answer: B
      Explanation:
      • N/A
  7. In which process, there is an increase in the randomness of the system?
    1. evaporation of water
    2. burning of candle
    3. melting of ice
    4. all of these
      5. Show Answer
      Answer: D
      Explanation:
      • During a spontaneous process, there is an increase in the randomness of the system.
  8. Which of the following favours a spontaneous change?
    1. increase in entropy of the system
    2. increase in internal energy of the system
    3. increase in degree of order of the system
    4. all of these
      5. Show Answer
      Answer: A
      Explanation:
      • N/A
  9. The statement of the second law of thermodynamics is:
    1. the entropy of the system is constantly increasing
    2. whenever a spontaneous process takes place, it is accompanied by an increase in the total energy of the universe
    3. A spontaneous change is accompanied by an increase in the total entropy of the system and its surroundings
    4. all of these
      5. Show Answer
      Answer: D
      Explanation:
      • N/A
  10. According to the second law of thermodynamics, the entropy of the universe is:
    1. constantly increasing
    2. constantly decreasing
    3. constant
    4. zero
      5. Show Answer
      Answer: A
      Explanation:
      • Since the entire universe is undergoing spontaneous changes, thus entropy of the universe is constantly increasing i.e ∆Suniv > 0.

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