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 a thermodynamic potential Internal energy Enthalpy Gibb's free energy All of these
2 Why an even Carnot engine Carnot give 100% efficiency. We cannot find ideal sources We cannot eliminate friction We cannot reach absolute zero temperature We cannot remove heat
3 Which of the following can be used visualize the third law thermodynamics Light Heat Water All of these
4 Because of second law of thermodynamics about the direction of energy flow what is possible. Heat Light Energy life
5 Internal energy of a gas decreased when It gains heat Change in cycle Change in adiatatic Change in reversible
6 Which of the following gases has the maximum rms speed at STP. O2 H2 N2 CO2
7 What kind of movement is dictated by the laws of thermodynamcis. Energy motion Heat work Light heat Energy light
8 How does heat transfer between objects. From cold to hot objects From hot to cold objects By electromagnetic radiations From hotter to hottest objects.
9 How do solar heat and light reach the Earth. By radiation By convection By conduction By conduction and convection
10 When the temperature of a body is equal to that of the surrounding then the body appears Dull black Red hot In thermal equilibrium To be cold
11 If the pressure of a gas is doubled, then its thermal conductivity will Increases Decreases Remain constant Be zero
12 The zero point of Kelvin scale is called. Critical point Terminal point Absolute zero Mid point
13 What is the total entropy change during an reversible cycle. Unity Infinite Zero Cannot be detected
14 When all the systems taking part in a process are included, the entropy. Decreases Either remains constant of increases Either remains constant or decreases Remains constnat
15 What is a measure of the total energy of a thermodynamics system. Entropy Enthalpy Randomness Chaos theory
16 Which quantity provides a quantitative measure of disorder. Entropy Enthalpy Randomness Chaos
17 Triple point of water in Kelvin scale is 0 K 100 K 273 .15 K 373.15 K
18 If we place oure hand below a lighted lamp we feel warmer due to. Conduction Convection Radiation None of these
19 If two gases have same reduced pressure volume and temperature it is according to Boyle's law Charles law Law of corresponding state Zeroth law
20 Advantage of using gases as thermornetic substrates is taht Gases have a small coefficient of expansion Expansion of gases is irregular Gases can be obtained in pure form Gases have a large coefficient of expansion.
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