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Thermodynamics Quiz

Dear Readers,

Important topics for Thermodynamics has been designed in such a way that it offers very practical and application-based learning to further make it easier for students to understand every concept or topic by correlating it with the day-to-day experiences.

Q1. Statement 1: Two vessels A and B of equal capacity are connected to each other by a stopcock. Vessel A contains a gas at 0°C and 1 atmosphere pressure and vessel B is evacuated. If the stopcock is suddenly opened, the final pressure in A and B will be 0.5 atmosphere Statement 2: If the temperature is kept constant, the pressure of a gas is inversely proportional to its volume :
  •  Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution


Q2.Statement 1: The temperature of the surface of the sun is approximately 6000 K. If we take a big lens and focus the sunrays, we can produce a temperature of 8000 K Statement 2: The highest temperature can be produced according to second law of thermodynamics :
  •  Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution


Q3.  Statement 1: Work done by a gas in isothermal expansion is more than the work done by the gas in the same expansion, adiabatically Statement 2: Temperature remains constant in isothermal expansion, and not is adiabatic expansion
  •   Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution

Q4. Statement 1: Efficiency of a Carnot engine decreases with decrease in temperature difference between the source and the sink. Statement 2: η=1-T_2/T_1 =(T_1-T_2)/T_2
  •  Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution


Q5.Statement 1: In an adiabatic process, change in internal energy of a gas is equal to work done on or by the gas in the process Statement 2: Temperature of gas remains constant in a adiabatic process
  •  Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution
 


Q6. Statement 1: Thermodynamic processes in nature are irreversible Statement 2: Dissipative effects can not be eliminated
  •  Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  • Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution


Q7.Statement 1: A Carnot engine working between 100 K and 400 K has an efficiency of 75% Statement 2: If follows from η=1-T_2/T_1 :
  •  Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution


Q8.Statement 1: When a glass of hot milk is placed in a room and allowed to cool, its entropy decreases Statement 2: Allowing hot object to cool does not violate the second law of thermodynamics :
  •  Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution


Q9.Statement 1: In adiabatic compression, the internal energy and temperature of the system get decreased. Statement 2: The adiabatic compression is a slow process. :
  •  Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  •  Statement 1 is False, Statement 2 is True
Solution


Q10. Statement 1: When a bottle of cold carbonated drink is opened, a slight fog forms around the opening Statement 2: Adiabatic expansion of the gas causes lowering of temperature and condensation of water vapours :
  •  Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1
  •  Statement 1 is True, Statement 2 is False
  • Statement 1 is False, Statement 2 is True
Solution

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