Physics ECAT Pre Engineering Chapter 11 Heat & Thermodynamics Online Test With Answers

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Physics ECAT Pre Engineering Chapter 11 Heat & Thermodynamics Online Test

Sr. # Questions Answers Choice
1 If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then C<sub>p</sub>- C<sub>v</sub>= R C<sub>p</sub>- C<sub>v &lt; R</sub> C<sub>p</sub>- C<sub>v = 0</sub> C<sub>p</sub>- C<sub>v &gt; R</sub>
2 Triple point of water is 273.16<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°F</span> 372.16K 273.16<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°F</span> 273.16
3 Rate of diffusion is Faster in solids than in liquids and gases Faster in liquids than in solids and gases Equal to solids, liquids and gases Faster in gases than in liquids and solids
4 Pressure of a gas at constant volume is proportion to Total energy of gas Average P.E to molecules Average K.E of molecules Total internal energy of gas
5 According to kinetic theory of gases, molecules of a gas behave like Inelastic spheres Perfectly elastic rigid sphere Perfectly elastic non-rigid spheres Inelastic non-rigid spheres
6 10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct? Each have same number of molecules Don't have same number of molecules Can't be predicted None
7 An isochoric process is one which take place at Constant internal energy Constant entropy Constant volume Constant pressure
8 Brownian motion increases due to Increase in size of Brownian particle Increase in temperature of medium Increase in density of medium Increase in viscosity of medium
9 If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is 2 : 1 4 : 1 1 : 4 3 : 4
10 The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at 546 K 273 K 546<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 273<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span>
11 Energy gas behaves like an ideal gast at High temperature and low pressure Low temperature and high pressure Both A and B None
12 R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes 2V 3V 0.5V V
13 Maximum density of H2O is at the temperature 32<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°F</span> 39.2<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°F</span> 42<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°F</span> 4<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°F</span>
14 At O° K which of the following properties of a gas will be zero? Kinetic energy Potential energy Vibrational energy Density
15 The product of the pressure and volume of an ideal gas is A constant Approximately equal to the universal gas constant Directly proportional to its temperature Inversely proportional to its temperature
16 Boyle's law is applicable in Isochoric process Isothermal process Isobaric process Isotonic process
17 Absolute temperature can be calculated by Means squares velocity Motion of the molecule Both A and B None of these
18 Which of the following is not thermo dynamical function? Enthalpy Work done Gibb's energy Internal energy
19 At constant volume temperature is increased. Then Collision on walls will be less Number of collisions per unit time will increase Collision will be in straight lines Collision will not change
20 The number of translation degress of freedom for a diatomic gas is 2 3 5 6
21 A process is a reversible process, if the entropy of the system increases decreases remains constant none of them
22 The disorder in the system increases due to the removal of heat addition of heat removal or addition of heat none of them
23 An irreversible heat flow from a hot to cold substances of a system, causes the disorder to decrease remains the same increase any one of them
24 If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of second law thermodynamics first law of thermodynamics third law of thermodynamics none of them
25 In all natural processes where heat flows from one system to another, there is always a net decrease in entropy increase in entropy decrease or increase in entropy none of them
26 When heat is removed from the system negative positive zero any one of them
27 When heat is added into the system then change in entropy is negative positive zero any one of them
28 Which quantity is important in stating the entropy of the system initial entropy final entropy change in entropy none of them
29 Which of the following is a state variable entropy pressure volume all of them
30 The concept of entropy was introduced into the study of thermodynamics in 1856 1865 1656 1685
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