[{"id":211232,"question":"A heat engine can develop efficiency equal to 100% if the temperature of the sink is","choices":[{"text":"Less than that of source","value":"A"},{"text":"Equal to that of source","value":"B"},{"text":"0 K","value":"C"},{"text":"0 <sup>o</sup>C","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":211231,"question":"The amount of heat needed per unit mass to raise the temperature of a system one degree at constant pressure is numerically aqual to","choices":[{"text":"The specific heat","value":"A"},{"text":"The specific thermal energy","value":"B"},{"text":"The specific heat at constant pressure","value":"C"},{"text":"the internal energy of the gas","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":211230,"question":"Entropy of universe is increasing day by da due to.","choices":[{"text":"Power generating processes","value":"A"},{"text":"Energy used into work","value":"B"},{"text":"Depletion of ozone","value":"C"},{"text":"All of the above","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":211229,"question":"Which of the following has negative specific heat","choices":[{"text":"Ne","value":"A"},{"text":"CO2","value":"B"},{"text":"O2","value":"C"},{"text":"Sturated vapours","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":211228,"question":"Why freezer a refrigerator is located in the top section","choices":[{"text":"Motor is not affected","value":"A"},{"text":"Heat gained from environment is less","value":"B"},{"text":"The entire chamber of freezer is cooled quickly","value":"C"},{"text":"Heat gained from environment is more","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":211227,"question":"The total gain in entropy of the working substance in a Carnot cycle is.","choices":[{"text":"Positive","value":"A"},{"text":"Negative","value":"B"},{"text":"Infinite","value":"C"},{"text":"Constant","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":211226,"question":"What is the amount of mechanical work done to melt 1 g of ic completely","choices":[{"text":"4.2 J","value":"A"},{"text":"42 J","value":"B"},{"text":"80 J","value":"C"},{"text":"336 J","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":211225,"question":"First law of thermodynamics is a","choices":[{"text":"Boyle 's law","value":"A"},{"text":"Charles' law","value":"B"},{"text":"Law of energy conservation","value":"C"},{"text":"Steffen Boltzmann law","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":211224,"question":"Mean free path of gas molecules is inversely proportional to its","choices":[{"text":"Volume","value":"A"},{"text":"Pressure","value":"B"},{"text":"Temperature","value":"C"},{"text":"Size","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":211223,"question":"Gas law PV = constant is for","choices":[{"text":"Adiabatic change","value":"A"},{"text":"Isothermal changes","value":"B"},{"text":"Isobaric changes","value":"C"},{"text":"Isochoric changes","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":211222,"question":"In the free expansion of a perfect gas there is no.","choices":[{"text":"work done","value":"A"},{"text":"Heat exchnged","value":"B"},{"text":"Internal energy changed","value":"C"},{"text":"All of the above","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":211221,"question":"Identify the irreversible process","choices":[{"text":"Explosion of a bomb","value":"A"},{"text":"Slow expansion of a gas","value":"B"},{"text":"Slow compression of a gas","value":"C"},{"text":"Slow compression of an eleastic spring","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":211220,"question":"In an isobaric process there is no.","choices":[{"text":"Pressure change","value":"A"},{"text":"Internal energy change","value":"B"},{"text":"Heat exchanged","value":"C"},{"text":"volume change or work done","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":211219,"question":"The thermal inertia of a thermodynamic system is known as its.","choices":[{"text":"Entropy","value":"A"},{"text":"Enthalpy","value":"B"},{"text":"Isothermal conduction","value":"C"},{"text":"Adiabatic conduction","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":211218,"question":"In Isochoric process there is no","choices":[{"text":"Work done","value":"A"},{"text":"Internal energy change","value":"B"},{"text":"Volume change or work done","value":"C"},{"text":"Heat exchanged","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":211217,"question":"Significant motion for the molecules of a monoatomic gas is.","choices":[{"text":"Rotatory","value":"A"},{"text":"Vibratory","value":"B"},{"text":"Translatory","value":"C"},{"text":"Random","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":211216,"question":"Which one of the following gases posses maximum oot mean square velocity.","choices":[{"text":"Hydrogen","value":"A"},{"text":"Oxygen","value":"B"},{"text":"Nitrogen","value":"C"},{"text":"Carbon dioxide","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":211215,"question":"If the pressure in a closed vessel is reduced by drawing some gas the mean free path of the gas molecules.","choices":[{"text":"Decreases","value":"A"},{"text":"Remains constant","value":"B"},{"text":"Increases","value":"C"},{"text":"First increases then decreases","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":211214,"question":"if temperature eon Celsius scale is 50 oC the temperature on Fahrenheit scale will be.","choices":[{"text":"102 <sup>o</sup>F","value":"A"},{"text":"108 <sup>o</sup>F","value":"B"},{"text":"112 <sup>o</sup>F","value":"C"},{"text":"122 <sup>o</sup>F","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":211213,"question":"A given quantity of an ideal gas is at pressure P and temperature T What is the isothermal bulk modulus of the gas.","choices":[{"text":"2/3 P","value":"A"},{"text":"P","value":"B"},{"text":"2P","value":"C"},{"text":"3/2 P","value":"D"},{"value":"E"}],"correctAnswer":2}]