PPSC Physics Chapter 3 Thermal Properties of Matter With Answers

image
image
image

PPSC Physics Chapter 3 Thermal Properties of Matter

Sr. # Questions Answers Choice
1 The expression PV/KT represents. Number of moles of the gas Number of molecules in the gas Total mass of the gas Density of the gas
2 If pressure and temperature of an ideal gas is doubled and volume is halved, the number of the gas molecules. Become half Remain constant Become double Become three times
3 If the specific latent heat of vaporization of oxygen is 214 kJ kg-1 how much heat will be absorbed when 3.0 kg of oxygen is boiled off at its boiling point. 14 kJ 64 k J 140 kJ 642 k j
4 When a solid is melting the temperature remains constant even through heat is being supplied because the Heat is being used to break up the intermolecular bonds Solid is not absorbing any heat Molecules are moving faster Molecules are farther a part
5 During solid ficain the temperature. Remains constant at the freezing point Increases at the freezing point Decreases at the freezing point Decreases at the melting point
6 The law of equation of energy is applicable to the system whose constituents are. At rest In orderly motion in random motion Moving at constant speed
7 What is the triple point of water. 273 .15 K 0 K 100 K 0 oC
8 On which of the following the kinetic theory of gases is not applicable. Water vapour Smoke particles Bound particles Free electrons
9 If the gas pressure is increased then its mean free path becomes. More Zero Infinite Less
10 Below which temperature gas can be liquified by increasing its pressure. Natural temperature Boyle temperature Critical temperature Absolute zero
11 If the number of gas molecules in a cubical vessel is increase from N to 3 N then its pressure and total energy will be. Half Three times Double Four times
12 The highest efficiency of a heat engine whose low temperature is 17 oC and the high temperature of 200 oC is. 20% 30% 35% 40%
13 What is the internal energy of a mono atomic ideal gas. Potential only Parity kinetic and parity potential Kinetic only Neither kinetic nor potential
14 In the gas equation PV =nRT , V is the volume of. 1 g of gas 1 L of gas 1 mol of gas 1 kg of gas
15 The gas temperature is increased from 27 oC to 127 oC What is the ratio of mean kinetic energies. 3/4 4/3 9/10 10/9
16 The heat required to sublime one mole of the substance at standard temperature and pressure is called. Latest heat Specific heat Heat of sublimation Heat capacity
17 Mean free path in a gas is the Distance travelled by a molecule before hitting a wall Average distance travelled by a molecule in one second Average distance travelled between molecules between any two successive collisions Root mean square velocity
18 The gas thermometer is taken as the primary standard because. Thermometers are easily reproducible Readings can be accurately taken No correction are necessary It produces he thermodynamic scale
19 A standard fixed point for calibrating a thermometer is. Boiling point of water Melting point of ice Temperature of steam Triple point of water
20 In general work done on or by a gas depends on. The initial state only The final state only The initial and final states The initial state the final state and the path
Download This Set

Is this page helpful?

×