A. Le-Chatelier principle
B. Kopp’s rule
C. Law of corresponding state
D. Arrehenius hypothesis
✅ The correct answer is option A.
Thermodynamics MCQs
Trouton’s ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K )
A. λb/Tb
B. Tb/λb
C. √(λb/Tb)
D. √(Tb/λb)
✅ The correct answer is option A.
Grams of butane (C₄H₁₀) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be
A. 580
B. 640
C. 1160
D. Data insufficient; can’t be computed
✅ The correct answer is option C.
Number of phases in a colloidal system are
A. 1
B. 2
C. 3
D. 4
✅ The correct answer is option B.
1/V (∂V/∂T)p is the mathematical expression
A. Joule-Thomson co-efficient
B. Specific heat at constant pressure (Cp)
C. Co-efficient of thermal expansion
D. Specific heat at constant volume (CV)
✅ The correct answer is option C.
Throttling (Joule-Thomson effect) process is a constant __________ process.
A. Enthalpy
B. Entropy
C. Pressure
D. None of these
✅ The correct answer is option A.
Claude gas liquefaction process employs cooling
A. At constant pressure
B. By throttling
C. By expansion in an engine
D. None of these
✅ The correct answer is option C.
Fundamental principle of refrigeration is based on the __________ law of thermodynamics.
A. Zeroth
B. First
C. Second
D. Third
✅ The correct answer is option C.
Which is an example of closed system?
A. Air compressor
B. Lquid cooling system of an automobile
C. Boiler
D. None of these
✅ The correct answer is option B.
The partial pressure of each constituent present in an alloy is __________ the total vapor pressure exerted by the alloy.
A. Less than
B. Equal to
C. More than
D. Either B or C; depends on the type of alloy
✅ The correct answer is option A.