Second Law of Thermodynamics - MCQ - Basic Level

Physics is an important subject in preparation for various Competitive exams. To keep a track of your preparation we have designed a small quiz of Basic Level Questions on Second Law of Thermodynamics. You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers.

Q1. A measure of the degree of disorder of a system is known as

•  Enthalpy
•  Isobaric
•  Isotropy
•  Entropy

Q2. If Î”The efficiency of Carnot engine operating with reservior temperature at 100 K and –23 K will be

•  (100 + 23)/100
•  (100 - 23)/100
•  (100 + 23)/373
•  (100 - 23)/373

Q3. Coefficient of performance of an ideal refrigerator working between temperature T1 and T2 (T1 > T2) is

•  Î² = T2/(T1 - T2)
•  Î² = T2/(T1 + T2)
•  Î² = T1/(T1 - T2)
•  Î² = T1/(T1 + T2)

Q4. Entropy of a thermodynamic system does not change when this system is used for

•  Conduction of heat from a hot reservoir to a cold reservoir
•  Conversion of heat into work isobarically
•  Conversion of heat into internal energy isochorically
•  Conversion of work into heat isochorically

Q5. The second law of thermodynamics states that

•  Heat is neither created nor destroyed
•  Heat can be converted into other forms of energy
•  Heat flows from a hot object to a cold one
•  The mechanical equivalent of heat is the amount of energy that must be expended in order to produce heat

Q6. A Carnot engine works between ice point and steam point. Its efficiency will be

•  26.81 %
•  53.36 %
•  71.23 %
•  85.42 %

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