MCQ concepts on thermodynamics, Quizzes of Thermodynamics

Download MCQ concepts on thermodynamics and more Quizzes Thermodynamics in PDF only on Docsity! MCQ REVIEW QUESTIONS- THERMODYNAMICS 8. 1. When liquid and vapor phases of one component system are in equilibrium (at a given temperature and pressure), the molar free energy is a. More in liquid phase b. Same in both the phases c. Replaced by chemical potential which is 9. more in vapor phase d. More in vapor phase 2. The work done in isothermal compression compared to that in adiabatic compression will be a. More b. More or less depending upon the extent of work done c. Same 10. d. Less 3. Enthalpy changes over a constant pressure path are always zero for gas a. Aperfect b. An easily liquefiable 11. c Areal d. Any 4. Asolid is transformed into vapor without going to the liquid phase at a. Belowtriple point b. Always c. Boiling point d. Triple point 5. For spontaneous changes in an isolated system (S=entropy) a. ds=0 b. ds>0O c ds<oO d. ds =constant 6. One mole of nitrogen at 8 bar and 600 K is contained in a piston-cylinder arrangement. It is brought isothermally against a resisting pressure of 1 bar. The work done in J by the gas is: a. 10373 b. 4364.9 c 4988.4 d. 30554 7. “Asolute distributes itself between two non-miscible solvents in contact with each other in such a way that, at a constant temperature, the ration of its concentrations in two layers is constant, irrespective of its total amount”. This is: a. The distribution law b. Acorollary of Henry’s law c. Followed from Margule’s equation 12. 13. 14. 15. d. None of these For organic compounds, group contribution method can be used for the estimation of a. Critical properties b. Thermal conductivity c. Specific gravity d. Specific volume Which one is true for a throttling process? a. The inversion temp is different for different gases b. The inversion temp is the temp at which Joule-Thompson co-efficient Is infinity c. Theinversion temp is same foe all gases d. Agas may have more than one inversion temp First law of thermodynamics deals with the a. Irreversible process only b. Reversible process only c. Direction of energy transfer d. None of these One kg of carbon requires 4/3 kg of oxygen and produces kg of carbon monoxide gas a 7/3 b. 11/7 c 8/3 d. 11/3 The behavior of a perfect gas, undergoing any change in the variables which control physical properties is governed by a. Boyle’s law b. Charles’ law c. Gay- Lussac’s law d. Allof these Which is the incorrect statement about Carnot’s cycle a. It provides concept of maximizing work output between the two temp limits b. It is used as the alternate standard of comparison of all heat engines c. All the heat engines are based on Carnot cycle d. All of the above The efficiency of Joule cycle is a. Greater than Carnot cycle b. Less than Carnot cycle c. Equal to Carnot cycle d. None of these The fuel mostly used in steam boilers is a. Coking bituminous coal b. Peat c. Non-coking bituminous coal