PPSC Physics Chapter 3 Thermal Properties of Matter With Answers

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PPSC Physics Chapter 3 Thermal Properties of Matter

Sr. # Questions Answers Choice
1 Which of the following is an example of irreversible process. Melting of ice Work done against friction Pettier heating and cooling All isothermal and adiabatic changes
2 Heat Carnot be transferred from a colder to a hotter region unless work is done This is the statement of. Firs law of thermodynamics Second law of thermodynamics Third law of thermodynamics Zeroth law of thermodynamcis
3 Which of the following should not change in an Isothermal process. Volume Pressure Temperature All of these
4 In order of a cyclic heat engine operating between two heat reservoirs to be as efficient as a Carnot engine. It must be. A gas engine Adiabatic Reversible A refrigerator
5 The heat accepted and rejected by a Carnot engine operating between two heat reservoirs defines. The efficiency of the working substance of the engine the ideal gas scale of temperature The ratio of the absolute temperature of the reservoirs The thermal capacity of the working substance
6 Which of the following phenomenon gives evidence of the molecular structure of mater Evaporation Diffusion Brownian movement All of the above
7 Difference between the molar heat capacity constant pressure and that a constant volume is equal to Root mean square velocity Mean free path Boltzmann's constant Universal gas constant
8 The internal inertia of a thermodynamics system is known as. Enthalpy Entropy Isotherm Adiabatic
9 A sample of an ideal gas may i) energy adiabatically, or ii) Expand isothermally. the net flow of heat into the gas from the exterior is. Positive is each case Negative for i) and positive for ii) Zero for i) and positive for ii) Positive for i) and negative for ii)
10 The mechanical equivalent of heat is. Physical quantity Constant Conversion factor Zero
11 Which quantity is common for systems in thermal equilibrium. Heat Temperature Momentum Specific heat
12 The temperature which is the same in oC and oF is. -20 -40 20 40
13 What happens to internal energy of a piece of lead when hammered. Increases Decreases Remains unchanged Becomes zero
14 The internal energy of an isolated system Is zero Keeps on changing Remains constant Cannot be judged
15 What is the necessary condition for Boyle's law to hold good. Isothermal Adiabatic Isobaric Isochoric
16 Which of the following has maximum specific heat. Glass Iron Brass Lead
17 For which process is the relation Delta Q = Delta V true. Isothermal Adiabatic isobaric Isochoric
18 In free expansion of a gas. the internal energy of the system. Increases Descreases Remain unchanged Becomes infinite
19 In onw cycle of a steam engine there are how many dead centres. 1 2 3 zero
20 Change in which parameter determines the work done by a gas during adiabatic prcoess. volume Pressure Temperature Weight
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