## Lakshya Education MCQs

Question: The heat and work are mutually convertible. this statement is called __________ law of thermodynamics.
Options:
 A. Zeroth B. First C. Second D. Third

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## More Questions on This Topic :

Question 1. According to kelvin-planck's statement of second law of thermodynamics,
1.     It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
2.     It is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
3.     It is impossible to construct a device which operates in a cyclic process and produces no effect other than the transfer of heat from a cold body to a hot body
4.     None of the above
Question 2. Which of the following statement is correct according to clausis statement of second law of thermodynamics?
1.     It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature.
2.     It is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.
3.     It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature by using refrigeration cycle.
4.     None of the above
Question 3. Which of the following is the correct statement of the second law of thermodynamics?
1.     There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy
2.     It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source
3.     It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
4.     All of the above
Question 4. Which of the following statement is correct according to clausis statement of second law of thermodynamics?
1.     It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature.
2.     It is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.
3.     It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature by using refrigeration cycle.
4.     None of the above
Question 5. Work-done during adiabatic expansion is given by (where p1 v1, t1 = pressure, volume and temperature for the initial condition of gas, p2, v2, t2 = corresponding values for the final condition of gas, r = gas constant, and γ = ratio of specific heats)
1.     (p1 v1 - p2, v2)/(γ - 1)
2.     [m R (T1 - T2)] /(γ - 1)
3.     [m R T1/(γ - 1)][1 - (p2, v2 /p1 v1)]
4.     All of these