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 A perfect gas is one whose Molecules are masless Molecules are energetic Molecules are perfectly elastic Molecules are at rest
2 The door of an operating refrigerator in a closed room is opened after sometime the temperature of the room will be Lowered Raised Unaffected Become zero
3 Thermodynamics deals with Isolated systems The interactions among various parts of the system The microscopic behavior of a system The interactions between system and surrounding
4 The volume of a goas at constant pressure is directly proportional to the temperature as measured on the. Celsius scale Kelvin scale Fahrenheit scale Baume scale
5 From any substance the temperature and pressure at which the material can coexist in all three states in equilibrium is called. Critical point Triple point Initial point Final point
6 In which temperature range water decreases in volume with increasing temperature. From 0 <sup>o</sup>C to 4 <sup>o</sup>C from 0 <sup>o</sup>C to 10 <sup>o</sup>C from 50 <sup>o</sup>C to 100 <sup>o</sup>C from 75 <sup>o</sup>C to 100 <sup>o</sup>C
7 Which of the following is a thermodynamic temperature scale. Celsius scale Fahrenheit scale Kelvin scale Rankine scale
8 What is the SI unit for thermal conductivity. W m-1 K-1 W m-2 k-2 W m-3 k-1 J kg -1 k-1
9 What is the heat required in Kilo joules when the temperature of 100 g of copper is raised thgough 20 K/. Specific heat capacity of copper is 0.4 x 10-3 kg -1 k-1 0.4 kj 0.8 kj 400 kj 800 kj
10 Which temperature is the absolute measure of temperature. Thermodynamic temperature Freezing point Boiling point Absolute zero
11 The Fahrenheit and Kelvin scales intersect at 40 -40 140 -140
12 On which temperature scale a degree is 1/180 of the interval between the freezing point and the boiling point. Celsius scale Fahrenheit scales Rankine scale Kelvin scale
13 Real gases obey gas laws only at Low pressure and high temperature High pressure and low temperature High pressure and high temperature Low pressure and low temperature
14 If volume of the gas doubled without changing its temperature the pressure of the gas is Reduced to half of original value Not changed Reduced to one fourth of original value Doubled
15 The efficiency of a diesel engine is about 15% to 35 5 355 to 40% 45% to 655 505 to 65 %
16 Efficiency of a Carnot engine can never be 1 or 100% unless cold reservoir is at absolute temperature. 0 K 100 K 273 K 373 K
17 Efficiency of a Carnot engine depends on Temperature Pressure Volume The nature of working substance
18 Thermodynamics concern its primary with the Measurement of quantity of heat Physical effects of temperature changes Conversion of heat into other energy forms Behavior of gases
19 What is the human body temperature in Celsius scale. 30 oc 36. 9 oC 98. 4 oC 100 oC
20 Which one of the following temperature scales is independent of the properties of any particular substance. Kelvin scale Gas scale Thermodynamic scale Celsius scale
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