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 law states that a change in the internal energy of a closed thermodynamic system is equal to the difference between the heat supplied to the system and teh amount of work by the system on the surrounding. Zeroth law of thermodynamics First law of thermodynamics Second law of thermodynamics Third law of thermodynamics
2 A heat engine with 100% efficiency would have to. Do no work Be at uniform temperature Use no heat Discharge of 0 <sup>o</sup>C
3 The follow of heat from hot body to cold body is an example of Adiabatic process Isothermal process Reversible process Irreversible process
4 By definition a gas is said to be have undergone adiabatic compressing when No heat exchange occurs between the gas and its surroundings The gas is compressed quickly The gas is compressed slowly The temperature of the gas remains constant
5 A diatomic gas contains only Translational K.E. Rotational K.E. Vibrational K.E. All of these
6 A frictionless heat engine can be 100% efficient only if its exhaust temperature is Equal to the input temperature Less than the input temperature 0 <sup>o</sup>C 0 K
7 Let at constant temperature the pressure of an ideal gas be doubled so that the new volume is. Doubled the original volume Same as original volume Reduced to half the original volume Reduced to two times the original volume
8 Which of the following is the ideal gas equation. PV -n RT P/V = n RT V/P = nR/T PV = T/nR
9 Which of the following is heat transfer by means of the emission or absorption of electromagnetic radiation such as sunshine. Conduction or diffusion Convection Radiation Mass transfer
10 Which is the heat transfer mode between an object and its environment due to circular fluid motion. Conduction Convection Radiation Mass transfer
11 The transfer of thermal energy between regions of matter due to a temperature gradient is called. Conduction Radiation Convection Sublimation
12 The temperature of 1 kg of hydrogen gas is the same as that of 1 kg of helium gas if. The gases have the same internal energy The gas molecules occupy equal volumes The gas molecules have the same root mean square speed The gas molecules have same mean translational K.E.
13 The temperature of a certain substance in Celsius scale of temperature is 800 oC in Kelvin scale it is. 173 K 931 K 1073 K 1193 K
14 The SI unit of heat capacity is. kg J Kg J-1 J K-1 Kg J-1 K-1
15 One calorie equals to 1.2 J 2.2 J 3.2 J 4.2 J
16 Which of the following is defined as the amount of heat required to raise the temperature of 1 g of water by 1 oC Joule BTO Electron volt Calorie
17 Which law states that if two systems are in thermal equilibrium with a third system they are also in the thermal equilibrium with each other. Third law of thermodynamics Second law of thermodynamics First law of thermodynamics Zeroth law of thermodynamics
18 Which of the following is the science of measuring the heat of chemical reactions or physical changes. Thermometry Calorimetry Telemetry Photometry
19 An inflated tyre suddenly bursts As a result of this temperature of the surrounding Increases Descreases Remains constant May increase or decrease
20 The actual gas can behave like an ideal gas at Low density and high pressure High density and high pressure Low density and low pressure High density and low pressure
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