Download Heat and Thermodynamics 300 MCQ

KARPAGAM ACADEMY OF HIGHER EDUCATION,COIMBATORE-21
DEPARTMENT OF PHYSICS
CLASS: I B. Sc. PHYSICS
BATCH: 2015 - 2018
HEAT AND THERMODYNAMICS (15PHU201)
QUESTIONS
Unit - I
1. Heat can be defined
as_________________.
2. The first thermometer was
constructed by_____________.
3. The specific heat (C) is defined
by_____________________.
4. Unit of specific heat is
_______________.
5. The quantity of heat required to
raise the temperature of the
whole of the substance through
1 °C is defined by
6. A calorimeter is mainly used to
measure the
_________________________.
7. The specific heat of silver is
_______________ than gold.
8. Newton’s law of cooling states
that the rate of loss of heat of a
body is _______________ to
the difference of temperature of
the body and the surroundings.
9. Newton’s law of cooling can be
obtained experimentally by the
graph plotted
between________.
10. The quantity of heat required to
raise the temperature of one
gram of a gas through at 1 ° C
OPTION 1
MULIPLE CHOICE QUESTIONS
OPTION 2
OPTION 3
OPTION 4
ANSWER
energy conduction
energy
convection
energy transition
all of the above
energy transition
Galileo
Newton
Kelvin
Celsius
Galileo
H/mq
H/m
H/q
H*mq
H/mq
calorie/g*°C
g*°C/calorie
calorie/g
calories
calorie/g*°C
Specific heat
Thermal
Capacity
Water equivalent
thermal equilibrium
Thermal Capacity
heat
temperature
pressure
volume
heat
higher
lower
equal
none of the above
higher
equal
directly
inversely
none of the above
directly
time vs. temperature
temperature vs.
time
temperature vs. velocity
none of the above
temperature vs. time
Cp
CH
Cv
zero
Cv
1
11.
12.
13.
14.
15.
16.
is equal at constant volume is
equal to_________________.
The value of the universal gas
constant R for one gram
molecule of a gas is equal to
__________.
Specific heat of a gas at
constant pressure is determined
by_________.
The specific heats both Cp and
Cv of hydrogen (for 1 gram) are
As per Dulong and Petit’s Law,
the exact value of atomic heat
of the substance is equal to
_________.
The atomic heat of lead is
_______________ than carbon
at 20 °C.
The atomic heat of silver at 20
K is _______________.
17. Einstein’s theory of specific
heat
18. At high temperature, the static
heat of a solid attains a value
19. At low temperature, the static
heat of a solid attains a value
20. According to Debye's theory,
the atomic heat of a solid at low
temperature varies as
21. Einstein’s theory of specific
heat of solids assumes that the
atoms of a solid vibrate simple
harmonics
22. According to Dulong's and
Petit's law, the average energy
of an atom of a solid at
temperature T is
7.54 x 107
8.31 x 107
4.31 x 107
zero
8.31 x 107
Joly’s differential
steam calorimeter
Regnault’s
method
Joule’s calorie meter
Callendar and
Barnes’ method
Regnault’s method
3.435 and 2.44
2.44 and 3.435
1 and 0
none of the above
3.435 and 2.44
5.26
5.96
5
zero
5.96
higher
lower
equal
none of the above
higher
0
0.2
4.8
0.4
accepts different
frequencies of
molecular vibrations
0.4
accepts same
frequencies of
molecular
vibrations
reflects molecular
vibrations
none of the above
accepts different
frequencies of
molecular vibrations
infinite
5/2 R
3R
1/2R
3R
0
5R
3R
0
proportional to its
absolute temperature
infinite
proportional to
square of its
absolute
temperature
proportional to cube of
its absolute temperature
independent of
temperature
proportional to cube
of its absolute
temperature
like longitudinal
waves
like transverse
waves
all with the same
frequency
in a complex manner
all with the same
frequency
1/2 KT
KT
2 KT
3 KT
3 KT
2
23. According to Dulong's and
Petit's law, the atomic heat of
an element of constant volume
24. The degeneracy parameter ea
satisfies this condition, the gas
is said to be
25. RMS speed of an ideal gas is
inversely proportional to the
square root of its
26. The RMS speed of gas at 400 K
is
27. Which of the following
variables controls the physical
properties of a perfect gas
28. Which of the following laws is
applicable for the behavior of a
perfect gas
29. The unit of time in SI unit is
30. The unit of energy in SI unit is
31. An ideal gas as compared to a
real gas at very high pressure
occupies
32. General gas equation is
33. Which of the following can be
regarded as gas so that gas law
could be applicable within the
commonly encountered
temperature limits.
34. The unit of pressure in SI units
is
35. Temperature of a gas is
produced due to
36. Kinetic theory of gases assumes
that the collisions between the
molecules are
37. Calorie is the quantity of heat
required to raise the
temperature of one gram of
water from 14.5 C to 15.5 C
increase with increase
of temperature
decrease with
increase of
temperature
become zero at absolute
zero
is constant
is constant
weakly degenerate
strongly
degenerate
non degenerate
none of the above
non degenerate
mass
twice the value at 100
K
temperature
four times the
value at 100 K
none of these
both of these
half the value at 100 K
same as at 100 K
mass
twice the value at 100
K
pressure
temperature
volume
all of the above
all of the above
Boyle's law
second
watt
Charles' law
hour
joule
Gay-Lussac law
day
joule/s
all of the above
minute
joule/m
all of the above
second
joule
more volume
PV = nRT
less volume
PV = mRT
same volume
PV = c
unpredictable
behaviour
PV = KiRt
more volume
PV = mRT
SO2, NH3, CO2,
moisture
O2, N2, H2, air
O2, N2, H2, air
Its heating value
O2, N2, water
vapour
mm of water
column
kinetic energy of
molecules
repulsion of molecules
dynes per square cm
attraction of
molecules
Pascal
kinetic energy of
molecules
perfectly elastic
perfectly
inelastic
partly elastic
partly inelastic
perfectly elastic
Energy
Power
Calorie
volume
calorie
O2, N2, steam, CO2
Kg/cm2
Pascal
3
38. The specific heat of a gas at
constant pressure by electrical
method can be determined by
Callender and Barnes method
39. Specific heat is defined as
quantity of heat required to
raise temperature of unit mass
of a substance through one
degree
40. One calorie is equal to raise in 1
C and quantity of water
41. Pound calorie is in 1 pound
quantity of water and its rise in
1 C temperature the value is
equal to
42. The unit of thermal capacity
43. One therm is in 10 5 pounds
quantity of water and raise in 1
C temperature the value is equal
44. The atomic heat for aluminium
is greater than boron
45. The atomic heat value of copper
is 5.79
46. The value of R is the same for
all gases provided the mass of
the gas is
47. One watt is equal to
48. Work done is the zero for the
following process
49. On volume basis, air contains
following parts of oxygen
50. In a free expansion process
51. The specific heat of air
increases with increase in
52. Which of the process is
irreversible process
53. For reversible adiabatic process
change in entropy is
Boyle's method
Callender and
Barnes method
Joule's method
Graham’s method
Callender and Barnes
method
Specific heat
calorie
pound calorie
thermal capacity
Specific heat
calorie
BTU
thermal
volume
calorie
1000 calories
mcq
453.6 calories
c = 1/m (dq/dt)
252
mc calories/C
0
none of the above
453.6 calories
mc calories/C
252 calories
2.52 x 10 7
calories
1000 calories
252 calories
2.52 x 10 7 calories
less than
equal to
greater than
all of the above
greater than
5.72
1.92
6.11
5.79
5.79
zero
1 Nm/S
100 gram
1 N/mt
50 gram
1 Nm/hr
one gram
1 KNm/mt
one gram
1 Nm/S
constant volume
free equation
all of the above
none of the above
all of the above
21
25
temperature
pressure
both a and b above
both pressure and
temperature
77
work done is zero but
heat increases
21
work done is zero
23
heat transfer is
zero
air flow
temperature
isothermal
adiabatic
throttling
all of the above
throtting
maximum
minimum
zero
negative
zero
both a and b above
4
54. The unit of temperature in SI
units is
55. The unit of mass in SI units is
56. The pressure of a gas in terms
of its mean kinetic energy per
unit volume E is equal to
57. The unit of power in SI units is
58. The ratio of two specific heats
of air is equal to
59. Which law states that the
internal energy of a gas is a
function of temperature
60. Which law states that the
specific heat of a gas remains
constant at all temperature and
pressure
61. Gases have
62. Work done in a free expansion
process is
63. Internal energy of a perfect gas
depends upon
64. Which of the following
temperature scales doesn’t have
negative numbers?
65. Which of two temperature
change are equivalent?
66. What temperature change on
the Kelvin scale is equivalent to
a 10 degree change on the
Celsius scale
67. A combustion process produces
a gas stream with the mass
fractions 14% CO2, 8% H2O,
5% O2, and 73% N2. What is
the cp of the mixture at 1000
K?
68. Control volume refers to a
Centigrade
Kilogram
Celsius
gram
Fahrenheit
tonne
Kelvin
quintal
Kelvin
quintal
t/3
Newton
t/2
Pascal
3E/4
erg
2E/4
watt
2E/4
watt
0.17
0.24
0.1
1.4
1.4
Charle's law
Joule's law
Regnault's law
Boyle's law
Joule's law
Charle's law
Only one value of
specific heat
Joule's law
two values of
specific heat
Regnault's law
three values of specific
heat
Boyle's law
no values
Regnault's law
two values of specific
heat
Positive
zero
temperature, pressure
and specific heats
maximum
zero
temperature only
Negative
temperature and
pressure
none of the above.
temperature only
Celsius
Kelvin
Reaumur
Fahrenheit
Kelvin
1K=1F
1F=1C
1 Re = 1 F
1K=1C
1K=1C
283 K
273 K
18 K
10 K
10 K
1.262 kJ/kgK
1.234 kJ/kgK
fixed region in
the space
1.167 kJ/kg
1.234 J/kgK
closed system
none of the above
1.262 kJ/kgK
fixed region in the
space
specified mass
5
Unit - II
1. Conduction is the process in
which heat is transmitted from
one point to the other through
the
substance__________________
.
2. Thermal diffusivity is defined
as ___________
3. The coefficient of thermal
conductivity of a rubber can be
determined by the principle of
______.
4. The relation between thermal
conductivity and electrical
conductivity is defined as
__________.
5. The pressure of a gas in terms
of its mean kinetic energy per
unit volume E is equal to
6. Kinetic energy of the molecules
in terms of absolute temperature
T is proportional to
7. Superheated vapour behaves
8. No liquids can exist as liquid at
9. The unit of power in SI units is
10. The condition of perfect
vacuum, i.e. absolute zero
pressure can be attained
11. Intensive property of a system
is one whose value
with actual movement
of particles.
the ratio of thermal
conductivity to
thermal capacity per
unit volume.
without actual
movement of
particles
directly
proportional to
the thermal
conductivity
Rectilinear of flow of
heat
Wiedemann-Franz
law
without any medium
none of the above
inversely proportional to
thermal conductivity
none of the above
without actual
movement of particles
the ratio of thermal
conductivity to
thermal capacity per
unit volume.
Cylindrical flow
of heat
radial flow of heat
none of the above
Cylindrical flow of
heat
Wiedemann law
Hookes law
none of the above
Wiedemann-Franz
law
E/3
the ratio of thermal
conductivity to
thermal capacity per
unit volume.
E/2
3E/4
2E/3
2E/3
T
J
exactly as gas
273 K
Newton
as steam
vacuum
Pascal
as ordinary vapour
zero pressure
erg
J2
approximately as a
gas
centre of earth
Watt
T
approximately as a
gas
zero pressure
Watt
a temperature of 273.16 C
a temperature of
0C
does not depend
on the mass of
the system like
temperature,
pressure etc.
a temperature of 273 C
cannot be attained
is not dependent on the
path followed but on the
state
is dependent on the
path followed and not
on the state
depends on the mass
of the system like
volume
a temperature of 273.16 C
does not depend on
the mass of the
system like
temperature, pressure
etc.
6
12. Specific heat of air at constant
pressure equal to
13. Which of the following does
not help to transfer heat?
14. All the following items are
good conductors of heat except
15. Which of the following is the
poorest conductor of heat?
16. Which one of these devices can
work without the help of
convection?
17. Convection is a process of heat
transfer that depends on
18. Which surface is the best
radiator of heat
19. On a cloudiness night, the earth
is gold because its heat is
20. The dimensional formula of K
is
21. Thermal capacity of a good
conductor is determined by
22. Thermal conductivity of a bad
conductor is determined by
23. The SI unit of thermal
conductivity is
24. Thermal conductivity of bad
conductors is measured by
25. Therefore the coefficient of
thermal conductivity is defined
as the amount of heat flowing
in one second across the
opposite faces of a cube of side
on cm maintained at a
difference of temperature
26. Two rods of length L and 2 L,
thermal conductivities 2 K and
K of same cross sectional area
are connected end to end, then
the equivalent thermal
0.17
0.21
0.24
1
0.24
conduction
dispersion
radiation
dispersion
A copper saucepan
convection
A stainless steel
spoon
a wooden table met
an aluminium teapot
a wooden table met
a gas
a liquid
a solid
a vacuum
a vacuum
Air - conditioner
Electric mixer
Hot water heater
Electric mixer
molecules vibrating and
then keeping still
smooth, shiny and black
radiation of energy
between two places
smooth, white and
silvery
density differences in
a liquid or a gas
rough, dull and black
Electric kettle
heavy molecules
falling and light
ones rising
rough dull and
white
conducted
convected
radiated
transported
radiated
M1L1T-3K-1
Lee's method or
Searle's apparatus
M1L1T3K-1
Forbe's method
or Lee's method
M1L1T2K-1
Searle's apparatus or
Forbe's method
M1L1T-2K1
none of the above
M1L1T-3K-1
Searle's apparatus or
Forbe's method
Forbe's method
Lee's method
Searle's apparatus
none of the above
Lee's method
JSm-1C-1
JS-1m-1C
Callender and Barnes
method
JS-1mC-1
JS-1m-1C-1
Searle’s method
JS-1m-1C-1
Lee's disc
method
none of the above
Lee's disc method
3C
1C
2C
0C
1C
(5/6) K
1.5 K
1.2 K
(8/9) K
1.2 K
density differences in
a liquid or a gas
rough, dull and black
7
conductivity of the system
27. The value of Stefan's constant is
28. The earth, thus, subjected to a
periodic propagated into the
interior of the earth. This wave
is called the-----------29. For convection
method________________
type of crystal used.
30. _____________ is used in
research in for the study in
infrared radiations
31. The thermal conductivity of
metal is different at
____________ temperature.
32. Lee's method for bad
conductors a steady current
passed through
5.996 x 10-8 w m-2 k1
4.3219 x 10-8 w
m-2 k-1
5.6696 x 10 8 w m-2 k-1
5.6696 x 10 7 w m-2
k-1
5.996 x 10-8 w m-2
k-1
annual wave
directional wave
wave
none of the above
directional wave
KMnO4
large crystal of
KMnO4
crystal
none of the above
large crystal of
KMnO4
thermopile
linear thermopile
thermocouple
none of the above
linear thermopile
same
different
both
none of the above
same
heater coil
thin disk
co-efficient of thermal
conductivity
copper plates
3.7418 x 10-16 Wm2
temperature
5.669 x 10 -8 Wm-2
K-1
heater coil
co-efficient of
thermal conductivity
8.3143 x 10 3 JK-1
Kmol-1
33. Searle's method determined by
conductivity
34. Gas constant R0 =
35. Thermal conductivity
measurement is also called as
36. The velocity of heat wave n =
37. Formula for cylindrical flow of
heat method
38. The thermopile originally
designed by __________
consisted of a number of
thermo couples joined in series.
39. Heat radiations travel in
40. Heat produced per second
41. The co-efficient of thermal
conductivity of a rubber tubing
can be determined in the
laboratory applying the
principle of
1.3802 x 10 -3 J K-1
thermo couples
thermal
conductivity
8.3143 x 10 3
JK-1 Kmol-1
Ingen-Hausz method
Ö 4πh
Flow method
Ö 2ωh
Angstrom's method
Öωh
Searle’s method
none of the above
Angstrom's method
Ö 2ωh
Q = - KA dq/dr
Q = - KA
Q = - dq/dr
KA = Q dq/dr
Q = - KA dq/dr
Stefan’s
curve
ELM/4.2 calories
Melloni
wave
EI/4.2 calories
Newton
straight line
4.2 calories
Hook
parallel line
5.89/EI calories
Melloni
straight line
EI/4.2 calories
continuous flow
method
cylindrical flow
of heat
spherical all method
none of the above
cylindrical flow of
heat
8
42. According to Avogadro’s
hypothesis
43. Gases have
44. Extension property of a system
is one whose value
45. Work done in a free expansion
process is
46. The statement that molecular
weights of all gases occupy the
same volume is known as
47. If a gas is heated against a
pressure keeping the volume
constant, then work done will
be equal to
48. Thermal conduction in metals
take place by
49. If c is the length and A area of
cross section of a rod and k is
thermal conductivity of
materials then the thermal
resistance is given by
50. In the Ingen-Hausz experiment
the thermal conductivity K and
length L of the rod up to which
wax melts are related as
51. Under steady state, the
temperature of body
52. The rate of flow of heat through
a metal bar of area of cross
section 1 m2 when temperature
the molecular weights
of all the perfect gases
occupy the same
volume under same
conditions of pressure
and temperature
only one value of
specific heat
depends on the mass
of the system like
volume
the sum of partial
pressure of
mixture of two
gases in sum of
the two
two values of
specific heat
does not depend
on the mass of
the system like
temperature,
pressure etc.
positive
negative
zero
maximum
maximum
Avogadro's hypothesis
Dalton's law
Gas law
Joule's law
Avogadro's
hypothesis
positive
negative
zero
pressure x volume
zero
free electrons
bound electrons
vibrations of molecules
none of the above
free electrons
KL/A
A/KL
KA/L
L/KA
L/KA
K/L = constant
K2/L = constant
K/L2 = constant
increases with time
decreases with
time
does not change with
time and is same at all
points of the body
KL = constant
does not change with
time and can be
different at different
points of the body
KL = constant
does not change with
time and can be
different at different
points of the body
thermal resistance
thermal
conductivity
diffusivity
resistivity
thermal conductivity
product of the gas
constant and the
molecular weight of the
ideal gas is constant
three values of specific
heat
gases have two
values of specific
heat
no value of specific
heat
the sum of partial
pressure of mixture of
two gases in sum of
the two
only one value of
specific heat
is dependent on the path
followed but on the state
is also constant
depends on the mass
of the system like
volume
9
gradient is 1 C/m under steady
state is called
53. A single plate of double
thickness is made by joining
two equal plates of thermal
conductivities K1 and K2, the
equivalent thermal conductivity
of the composite plate will be
54. In Searle's method for finding
conductivity of metal, the
temperature gradient along the
bar
55. Properties of substances like
pressure temperature and
density in thermodynamics is
co-ordinates are
56. Mixture of ice and water form a
57. Which of the following is not
intensive property
58. If a certain amount of dry ice is
mixed with same amount of
water at 80 C, the final
temperature of mixture will be
59. When we touch a piece of metal
and a piece of wood that are
placed in the same room, the
piece of metal feels much
colder than the piece of wood.
This happens because of the
difference in:
60. Which of the following could
NOT be used to indicate a
temperature change? A change
in:
61. An open system is one in which
62. A closed system is one, which
2K1K2/K1+K2
K1K2/K1+K2
K1/K1+K2
K2/K1+K2
2K1K2/K1+K2
is greater near the hot
end
is greater near
the cold end
is same at all points
along the bar
increases as we go
from hot to cold end
is same at all points
along the bar
path function
closed system
point function
open system
cyclic function
isolated system
real function
heterogeneous system
point function
heterogeneous system
pressure
heat
specific volume
density
heat
80 C
0C
40 C
110 C
0C
Specific heat
Temperature
Density
Thermal conductivity
Thermal conductivity
color of a metal rod
mass does not cross
boundaries of the
system, though energy
may do so
Permits the passage of
energy and matter
length of a liquid
column
neither mass nor
energy crosses
the boundaries of
the system
Does not permit
the passage of
pressure of a gas at
constant volume
electrical resistance
mass of one mole of
gas at constant
pressure
both energy and mass
cross the boundaries of
the system
Permits the passage of
energy across the
mass crosses the
boundary but not the
energy
Permits the passage
of matter across the
both energy and mass
cross the boundaries
of the system
Permits the passage of
energy across the
10
63. The process of heat transfer by
the movement of mass from one
place to another is called:
64. Which mechanism of heat
transfer is involved in heat flow
from Sun to Earth?
65. If the absolute temperature of a
radiating objects is doubled, by
what factor does the rate of
energy emission change?
Unit - III
1. When the pressure of a constant
mass of gas is not too great say
less than about
2. Which of the following
variables control the physical
properties of a perfect gas
3. The unit of temperature in SI
unit is
4. Work which of the following
substances the gas lower can be
used with minimum error
5. The stream NTP states for
6. A heat exchange process in
which the product pressure and
volume constant is known as
7. Zero law of thermodynamics
8. If a certain amount of dry is
mixed with some amount water
of 80 C final temperature
across the boundaries
energy and
matter across the
boundaries
boundary but does not
permit the passage of
matter
boundary but does
not permit the
passage of energy
boundary but does not
permit the passage of
matter
Convection
Conduction
Radiation
Induction
Convection
Convection
Conduction
Radiation
Induction
Radiation
2
4
8
16
16
2 atm
5 atm
3 atm
1 atm
1 atm
pressure
volume
all the above
atomic gas
atomic gas
centigrade
Kelvin
Fahrenheit
Rankine
Rankine
dry stream
cool stream
natural
temperature and
pressure
free expansion
superheated stream
normal thermodynamic
pressure
none of the above
superheated stream
normal
thermodynamic
pressure
adiabatic process
hyperbolic process
hyperbolic process
states that systems are
both in equilibrium
does not exist
states that systems are
both in equilibrium
40 C
60 C
0C
temperature and
pressure
deals with conversion
of mass and energy
isentropic
process
deals with
reversibility and
irreversibility
process
80 C
0C
heat exchange process
11
9. Work done is zero for the
following process
10. One watt is equal to
11. The molecules of an ideal gas
have
12. The value of Boltzmann's
constant is
13. According to kinetic theory of
gases the relation between
pressure P density r and mean
square velocity is
14. The temperature of a gas is
doubled, then its root mean
square speed becomes
15. The average velocity of the
molecules in a gas in
equilibrium is
16. The average energy of
molecules of monatomic gas at
temperature T is
17. A diatomic gas molecule has
translational, rotational and
vibrational degree's of freedom,
the ratio of Cp/Cv is
18. The kinetic energy per unit
volume of a perfect gas is equal
to
19. For a gas the rms speed at 800
K is
20. Which turns out to be just 1/T,
where T is previously defined '
thermodynamic temperature'
normally measured in
21. Typical speeds in excess of
__________ at room
temperature
22. The gas particles are typically
separated by distances which
are much _________ than the
constant volume
1 Nm/s
all the above
1 K/nm
none of the above
0
all the above
1 Nm/s
only kinetic energy
free expansion
1 N/mt
only potential
energy
both KE and PE
none of the above
only kinetic energy
1.38 x 10 -16 J K-1
1.38 J K-1
1.38 x 10 -23 J K-1
8.314
1.38 x 10 -23 J K-1
P = 1/2 P C2
P = 1/3 P C2
P = 1/2 P C
P = 1/3 P C
P = 1/3 P C2
double
Ö2 times
half
1/Ö2 times
Ö2 times
proportional to ÖT
proportional to
T2
proportional to T
equal to zero
equal to zero
1/2 KT
3/2 KT
KT
5/2 KT
3/2 KT
1.67
1.4
1
2
1.4
2/3 P
four times the value of
200 K
3/2 P
twice the value
of 200 K
P/3
1/2 P
half the value of 200 K
same as at 200 K
3/2 P
twice the value of 200
K
Newton
Kelvin
Calorie
meter
Kelvin
350 m/s
200 m/s
300 m/s
100 m/s
200 m/s
smaller
bigger
strongly
larger
larger
12
particles size
23. Equipartition theorem or the
equipartition of energy called
the
24. Molecules has an associated
mean energy of 1/2 KB T where
KB=
25. Boltzmann’s constant is related
to our old friend the molar gas
constant R
26. Every molecular or atomic
degree of freedom, there is an
average_______ of associated
energy
27. A mass of gas occupies a
volume of 8 liters at a pressure
of 1 atm and a temperature of
28. Determine the final pressure
and the final temperature,
assuming it to be an ideal gas
whose value of r =
29. 5 gm air is heated from 273 K
to 275 K. The change in
internal energy of air will be
30. Moon has no atmosphere
because
31. An ideal gas exerts a pressure
P. The mean kinetic energy per
unit volume is E which of the
following relation is correct
32. According to kinetic theory of
gases at absolute 0 C
temperature
33. If 1 kg of water at its normal
boiling point forms 1.671 m3 of
steam the external latent heat of
vaporization of water is about
Boltzmann’s constant
kinetic theory
molecular theory
molecules kinetic
theory
kinetic theory
380.650 x 10 -23 J/K
383.650 x 10 -23
J/K
383.650 x 10 23 J/K
380.650 x 10 23 J/K
380.650 x 10 -23 J/K
8.31 J/mol.K
8.41 J/mol.K
8.314 J/mol.K
8.143 J/mol.K
8.314 J/mol.K
3/2 KB
1/2 KB
1 KB
5/2 KB
1/2 KB
258 abs
300 abs
200 abs
100 abs
300 abs
1.5
0.5
0.05
1.05
1.5
7.22 J
5.22 J
8.16 J
3.5 J
it is far away from the
surface of the earth
its surface
temperature is 10
C
the rms velocity of all the
gas molecular is more
than the escape velocity
of the moon’s surface
the escape velocity of
the moon’s surface is
more than the rms
velocity all molecules
7.22 J
the rms velocity of all
the gas molecular is
more than the escape
velocity of the
moon’s surface
P =E
P = E/2
P =2/3 E
P = 3/2 P
P =2/3 E
Water freeze
liquid helium
freeze
molecules motion stops
liquid hydrogen
freeze
molecules motion
stops
400 k cal/kg
40 k cal/g
4 k cal/kg
40 cal/kg
40 k cal/g
13
34. One mole of an ideal gas
requires 207 J to heat to raise
the temperature by 10 K when
heated at constant pressure. If
the same gas is heated at
constant volume to raise the
temperature by 10 K, then heat
required is
35. For an ideal gas, Cv/Cp is
36. If P is the exerted by a gas and
E is the K.E per unit volume,
then
37. Boyle's law is applicable in
38. If the pressure of an ideal gas is
decreased by 10 %
isothermally, then its volume
will
39. The lower calorific value of
fuel may be obtained by adding
the heat of stream formed
during combustion to the higher
calorie value
40. One kg of carbon monoxide
requires 4/7 Kg of oxygen and
produces
41. In a free expansion process
42. The heat focus from a cold
body on a hot body with the aid
of an external source. This
statement is given by
43. The gas in cooling chamber of a
closed cycle gas turbine is
cooled at
44. The isothermal and adiabatic
process are regarded as
45. The heating of gas at constant
volume is governed by
46. The ratio of specific heat at
96.6 J
>1
124 J
<1
198.8 J
1
215. 43 K
1
124 J
<1
P = E/3
P = 3/2 E
P = 2/3 E
P = (2/3) E
isochoric process
P = (2/3) E
isothermal
process
isobaric process
isotonic process
isothermal process
increase by 10 %
increase by 11.1
%
decrease by 10 %
decrease by 9 %
increase by 11.1 %
yes
no
none of these
all of the above
no
11/3 kg of carbon
dioxide gas
w1-2 = 0
7/3 kg carbon
monoxide gas
Q1-2=0
11/7 kg of carbon
monoxide gas
du = 0
none of the above
all of the above
11/7 kg of carbon
monoxide gas
all of the above
Kelvin
Joule
Celsius
none of the above
Celsius
constant pressure
either reversible or nonreversible
none of the above
constant pressure
reversible process
constant
temperature
irreversible
process
none of the above
reversible process
Boyle's law
equal
Charle's law
less than
Gay-Lussac's law
greater than
Avogadro's law
none of the above
Gay-Lussac’s law
less than
constant volume
14
constant pressure Cp and
specific heat at constant volume
is always
47. The fuel mostly used in cement
industry and in metallurgical
process is
48. The molecules mass expressed
in gram of all gases at NTP
occupies a volume of
49. Out of the following, the
physical quantity that relates
with first law of
thermodynamics is
50. In producing cooling by
adiabatic demagnetization, we
use
51. In Carnot cycle, the first step is
52. The efficiency of Carnot engine
working between steam point
and ice point is
53. According to kinetic theory of
gases, at absolute zero
54. A heat engine:
55. The state of an ideal gas was
changed three times at three
different temperatures. The
diagram represents three
different isothermal curves.
Which of the following is true
about the temperature of the
gas?
56. The state of an ideal gas was
changed three times in a way
wood charcoal
bituminous cake
pulverized coal
cake
pulverized coal
0.224 liters
2.24 liters
22.4 liters
224 liters
22.4 liters
temperature
pressure
energy
number of moles
energy
paramagnetic
substance
adiabatic expansion
ferromagnetic
substance
adiabatic
compression
26.81%
0
volume of gas reduce to
zero
26.81%
kinetic energy of
molecules reduces to
zero
isothermal expansion
paramagnetic
substance
isothermal
compression
1
specific heat of
molecules reduces to
zero
0
kinetic energy of
molecules
reduces to zero
converts heat input to
an equivalent amount
of work
converts work to
an equivalent
amount of heat
takes heat in, does work,
and loses energy heat
pressure of gas
reduces to zero.
uses positive work
done on the system to
transfer heat from a
low temperature
reservoir to a high
temperature reservoir
T1 > T2 > T3
T1 > T2 < T3
T1 < T2 < T3
T1 > T2 = T3
T1 < T2 < T3
P1 > P2 > P3
P1 > P2 < P3
P1 < P2 < P3
P1 = P2 > P3
P1 > P2 > P3
magnetic substance
diamagnetic substance
isothermal expansion
takes heat in, does
work, and loses
energy heat
15
that the pressure stays the same.
The graph represents three
isobaric lines. Which of the
following is true about the
pressure of the gas?
57. The temperature of an ideal gas
increases from 20 ̊C to 40 ̊C
while the pressure stays the
same. What happens to the
volume of the gas?
58. The state of an ideal gas was
changed three times in a way
that the volume stays the same.
The graph represents three
isobaric lines. Which of the
following is true about the
volume of the gas?
59. The absolute temperature of an
ideal diatomic gas is
quadrupled. What happens to
the average speed of molecules?
60. The average molecular kinetic
energy of a gas depends on:
61. The theoretical (Carnot)
efficiency of a heat engine
operating between 600C and
100C is
62. Which of the following is
always true for an isothermal
process of an ideal gas?
63. According to which law, all
perfect gases change in volume
by l/273th of their original
volume at 0°C for every 1°C
change in temperature when
pressure remains constant
64. At room temperature, the rms
speed of the molecules of a
certain diatomic gas is found to
be 1930 m/s. The gas is
It doubles
It quadruples
It is cut to one-half
It is cut to one-fourth
it slightly increases
V1 >V2 >V3
V1 > V2 < V3
V1 < V2 < V3
V1 = V2 > V3
V1 >V2 >V3
Quadruples
Doubles
Triples
Increases by a factor
of 1.41
Doubles
Pressure
Volume
Temperature
Number of moles
Temperature
16.70%
42.70%
57.30%
57.30%
The internal energy
does not change
20.00%
No heat flows
into or out of the
system
The pressure does not
change
The volume does not
change
The internal energy
does not change
Joule's law
Boyle's law
Regnault's law
Charles' law
Charles' law
H2
F2
O2
Cl2
H2
16
65. Kinetic Theory is based on an
ideal gas model. The following
statements about the ideal gas
are true EXCEPT:
66. An ideal gas with an internal
energy U initially at 0 ̊C is
heated to 273 ̊C. What is the
new internal energy in terms of
U?
67. The change of the state of an
ideal gas is presented by the
diagram. What is the ration
between work done on the gas
during the process 2→3 and
work done on the gas during the
process 4→1?
68. The state of an ideal gas is
changed isothermally from
position 1 to position 2 is
shown above. What is the
change in the internal energy of
the gas during this process?
69. If two molecules in a gas
collide, then
Unit - IV
1. The ratio of root mean square
velocity to average velocity of
gas molecules at a particular
temperature is
2. First law of thermodynamics
deals with
3. In SI units, the value of
universal gas constant is
4. The throttling process is
5. All the commercial liquid fuels
are delivered from natural
The average
molecular kinetic
energy is directly
proportional to the
absolute temperature
All molecules
move with the
same speed
All molecules make
elastic collisions with
each other and the walls
of the container
The attractive force
between the
molecules can be
ignored
All molecules move
with the same speed
U
1/2U
1/4U
2U
2U
(2/1)
(1/2)
(4/1)
(3/1)
(3/1)
ΔU = W
ΔU = Q
velocities are
always
exchanged
ΔU > 0
ΔU = 0
ΔU = 0
both molecules always
speed up
total kinetic energy
always increases
total momentum is
always exchanged
3.086
conservation of mass
4.086
conservation of
energy
1.086
conservation of
energy
8.314 J/Kg mole/ K
reversible
1.086
conservation of
momentum
83.14 J/Kg mole/
K
irreversible
831.4 J/Kg mole/ K
all of the above
8314 Kg mole/ K
none of the above
8314 Kg mole/ K
irreversible
TRUE
FALSE
all of the above
none of the above
TRUE
total momentum is
always exchanged
0.086
conservation of heat
17
petroleum
6. A cycle consisting of one
constant pressure, one constant
volume and two isentropic
process is known as
7. The efficiency and work ratio
of a simple gas turbine cycle are
8. There is a loss of heat in an
irreversible process
9. Water gas is obtained by
passing air and a large
10. Work done in a free expansion
process is
11. Which of the following
statement is correct
12. The atomic of mass of an
element is the number of times
the atom of that element is
heavier than the hyrogenatome
13. In an ideal gas turbine plant it is
assumed that the compression
and expansion are
14. Zeroth law of thermodynamics
is
15. The ratio of adiabatic and
isothermal elasticities of a gas
is
16. The physics underlying the
working of a refrigerator
closely resembles the physics
underlying
Carnot cycle
sterling cycle
Otto cycle
diesel cycle
diesel cycle
low
very low
high
very high
very low
TRUE
FALSE
all of the above
none of the above
TRUE
correct
incorrect
all of the above
none of the above
incorrect
zero
maximum
position
zero
the heat and work
done are boundary
phenomena
minimum
the heat and
work represent
the energy
crossing the
boundary of
system
the heat and work done
are path function
all of the above
all of the above
TRUE
FALSE
all of the above
none of the above
TRUE
isothermal
isentropic
none of the above
kinetic energy of
molecules of gas is
zero
ideal gas does
not contain
molecules
polytropic
if two systems are
separated in thermal
equilibrium with a third
system then they
themselves are in thermal
equilibrium with each
other
none of the above
isentropic
if two systems are
separated in thermal
equilibrium with a
third system then they
themselves are in
thermal equilibrium
with each other
r
r2
r-1
none of the above
r
ice formation
heat engine
vapour compression
machine
vaporization water
heat engine
18
17. The efficiency of a Carnot
engine is 0.4. If the temperature
of sink is 27 C the temperature
of source is
18. Anything outside the
thermodynamics system which
can exchange energy with it and
has a direct bearing on the
behaviour of the system is
called
19. ________ which can exchange
matter and energy with the
surrounding
20. ________ is called the equation
of state of the liquid
21. First law of thermodynamics
equation_____________
22. ________ types of equilibrium
as there in thermodynamics
23. In which year Clement and
Desormes discovered the
determination of g
24. In Carnot’s engine the source
25. A Carnot engine has the same
efficiency between 1000 K and
500 K and between x. k and
1000 K. calculate x =?
26. An engine works between the
temperature 30 K and 300 K.
What is its efficiency?
27. The atomic mass of sulfur is
28. The efficiency if a reversible
Carnot’s engine working
between temperature T1 and T2
is
29. A diatomic gas at 18 C is
compressed adiabatically to
1/32 times of its original
volume. The temperature after
127 C
500 C
500 K
400 K
500 K
surroundings
system
Carnot engine
surface
surroundings
closed system
isolated system
open system
all of the above
open system
f = (P, V)
f (P, V) = T
f (V, T) = P
f (P, T) = V
f (P, V) = T
Q = (V2-V1)+W
Q = (V2+V1)-W
Q = (V1-V2)+W
Q = (V1+V2)-W
Q = (V2-V1)+W
1
2
3
4
3
1819
insulates heat
1981
conducts heat
1918
conducts electricity
1891
insulates electricity
1819
conducts heat
1000 K
3000 K
4000 K
2000 K
2000 K
50%
12
47%
14
90%
16
10%
32
90%
32
T2/T1
T1/T2
1-T2/T1
T1/T2-1
1-T2/T1
18 C
887 C
891 C
144 C
891 C
19
compression will be
30. A Carnot’s engine us operating
between 100 C and 50 C. Its
efficiency will be
31. A reversible heat engine is 0.4.
If the temperature of the sink is
27 C, the temperature of source
is
32. The door of running
refrigeration inside a room is
left open, Mark the correct
statement
33. In steady flow process, the ratio
of
34. The entropy of the universe is
continuously of the increase
35. Select the correct statement as
per Charle's law
36. The unit of energy in SI unit is
37. Diesel cycle consists of
_________ process
38. When coal is first dried and
crushed to a fine powder by
pulverizing machine, the
resulting fuel's called
39. The process is adiabatic, if the
value of n in the equation PVn =
C is
40. The heating of a gas at constant
volume is governed by
41. The ratio of specific heat at
constant pressure and specific
heat at constant volume is
always__________ one
42. The lower caloric value of fuel
may be obtained by adding the
heat of steam formed during
13.40%
15.20%
50%
100%
13.40%
less than that of
source
equal to that of
source
0C
0K
0K
the room will be
cooled slightly
heat transfer is
constant
the room will be
warmed
work transfer is
constant
the room will be cooled
to the temperature inside
the refrigerator
mass flow at inlet and
outlet is same
the temperature of the
room will remain
unaffected
the temperature of the
room will remain
unaffected
all of the above
all of the above
correct
PV = constant if T is
kept constant
Joule
incorrect
V/T = constant if
P is kept constant
Joule meter
all of the above
P/T = constant if V is
kept constant
Watt
correct
V/T = constant if P is
kept constant
Joule
two constant volume
and two isentropic
two constant
pressure and two
isentropic
two constant volume and
two isothermal
none of the above
V/T = constant if P is
kept constant
Joule/Meter
one constant
pressure, one
constant volume and
two isentropic
wood charcoal
bituminous coal
briquetted coal
none of the above
none of the above
0
1
g
a
g
Boyle's law
Charle's law
Gay-Lussac law
Avogadro’s law
Gay-Lussac law
equal to
less than
greater than
none of the above
less than
yes
no
all of the above
none of the above
no
one constant pressure,
one constant volume
and two isentropic
20
combustion to the higher
calorific value
43. An adiabatic process occurs at
constant
44. Internal energy of a real gas
depends upon
45. Transfer of heat from a body at
low temperature to a body at
high temperature
46. Law of conservation of energy
is accordance with
47. When a gas undergoes
expansion or compression at
constant temperature, the
process is called
48. In a throttling process
49. Which of the following is not
an extensive property of a
thermo-dynamic system?
50. The measurement of
thermodynamics property
known as temperature, is based
on
51. A system consisting of more
than one phase is called
52. A system comprising of a single
phase, is known as
53. A heat engine that in each cycle
does positive work and loses
energy as heat, with no heat
energy input, would violate:
54. A Carnot cycle:
55. A Carnot engine operates
between 200°C and 20°C. Its
maximum possible efficiency
temperature
heat
none of the above
heat
only on the pressure of
the gas
none of the above
only on the
temperature of the gas
is impossible
Zeroth law of
thermodynamics
pressure
only on the
volume of the
gas
is possible by
keeping both
bodies in contact
first law of
thermodynamics
is possible by doing
some external work
second law of
thermodynamics
none of the above
third law of
thermodynamics
is possible by doing
some external work
first law of
thermodynamics
isothermal process
W=0
isochoric process
E=0
isobaric process
H=0
adiabatic process
all of the above.
isothermal process
H=0
Total mass
Total internal
energy
Total volume
Temperature
Temperature
Zeroth law of
thermodynamics
First law of
thermodynamics
Second law of
thermodynamics
isolated system
open system
non-uniform system
open system
closed system
homogeneous system
None of the above.
Heterogeneous
system.
Heterogeneous
system.
the Zeroth law of
thermodynamics
is bounded by two
isotherms and two
adiabats on a p-V
graph
the first law of
thermodynamics
consists of two
isothermal and
two constant
volume processes
the second law of
thermodynamics
the third law of
thermodynamics
is any four sided process
on a p-V graph
only exists for an
ideal gas
the first law of
thermodynamics
is bounded by two
isotherms and two
adiabats on a p-V
graph
90%
100%
38%
72%
38%
only on the
temperature of the gas
Zeroth law of
thermodynamics
Heterogeneous
system.
homogeneous system
21
is:
56. What is the name of the
following statement: “When
two systems are in thermal
equilibrium with a third system,
then they are in thermal
equilibrium with each other”?
57. The process of heat transfer
from object to another because
of molecular motion and
interaction is called:
58. Which of the following
parameters does not
characterize the
thermodynamics state of
matter?
59. Which of the following is not a
state variable?
60. An aluminum plate has a
circular hole. If the temperature
of the plate increases, what
happens to the size of the hole?
61. Boyle's law i.e. pV = constant is
applicable to gases under
First Law of
Thermodynamics
Second Law of
Thermodynamics
Mechanical equivalent of
heat
Zeroth Law of
Thermodynamics
Zeroth Law of
Thermodynamics
Convection
Conduction
Radiation
Induction
Conduction
work
volume
pressure
Temperature
Work
Work
Internal energy
Entropy
Temperature
Work
Increases
Stays the same
all ranges of pressures
Decreases
only small range
of pressures
Increases the top half
of the hole
steady change of
pressures
Increases
only small range of
pressures
changing the
stoichiometry
increase the
activation energy
providing an alternative
reaction mechanism of
lower activation energy
2. A solid has very high melting
point, is very hard, and its
liquid is non-conducting. The
compound is?
3. When one mole of ice melts to
liquid at 0 C
a molecular solid
a metallic solid
the entropy of a
system decreases
4. The entropy of a chemical
system will usually increase
a molecule is broken
down in two or more
the entropy of a
system remains
the same
a liquid changes
into a gas
Unit - V
1. A catalyst speeds up a chemical
reaction by
high range of pressures
a covalent network solid
shifting the
equilibrium towards
the side of the
product
an ionic solid
providing an
alternative reaction
mechanism of lower
activation energy
a covalent network
solid
the entropy of the system
increases
the order of system
increases
the entropy of the
system increases
all of the above
all of the above
22
when
5. Arrange the common unit cells
of metals from the least dense
packing to the most dense
packing
6. The normal boiling point of a
liquid is
fragments
BCC<FCC<SC
7. Which intermolecular forces are
present in Phenol?
8. Which of these is intensive
variable?
9. In a reversible adiabatic
process, the change of entropy
10. The change in entropy of a
mole of an ideal gas, when the
gas undergoes free expansion is
11. In a reversible process, the
entropy of the system
12. The unit of entropy
13. A piece of ice is added to water
in a cup, the energy
14. Net entropy change of a system
in Carnot's cycle
15. Which of the following
represents a reversible process?
16. In the two gases at the same
molecule is equal
17. Which of the following
represents a reversible process?
18. In which process the entropy
can increase
19. In which process work is
maximum?
20. In the below process which can
FCC<BCC<SC
FCC<SC<BCC
SC<BCC<FCC
SC<BCC<FCC
the temperature at which
the vapour pressure of
the liquid equals the
ambient atmospheric
pressure
the temperature at
which the vapour
pressure of the liquid
equals to 1 atm
the temperature at
which the vapour
pressure of the liquid
equals to 1 atm
London dispersion
only
area
the temperature
above which the
substance cannot
exist as a liquid
regardless of the
pressure
dipole-dipole
only
temperature
hydrogen-bonding only
all of the above
all of the above
entropy
volume
temperature
increases
decreases
remains unchanged
none of these
remains unchanged
positive
negative
zero
none of these
positive
increases
remains zero
decreases
remains constant
remains constant
Joule/Kelvin
is increased
Calorie/Kelvin
decreased
both a and b
undergoes no change
none of these
sometimes increases
both a and b
is increased
zero
positive
negative
more than 1
zero
ds<0
ds=0
ds>0
none of these
ds=0
the internal energy is
equal
the entropy is
equal
pressure is equal
the internal energy is
equal
combustion
diffusion
melting
the average kinetic
energy per molecule
is equal
neutralization
gas changes to liquid
liquid changes to solid
gas changes to solid
adiabatic
solid changes to
liquid
irreversible
cyclic
reversible
solid changes to
liquid
reversible
crystallization of
melting of iron
conversion of ice to
vapourisation of
crystallization of
the temperature at
which the entropy of
the liquid is equal to
zero
melting
23
represent the decrease in
entropy?
21. In which process the change in
entropy gets the positive value
at constant pressure and
temperature?
22. The absolute entropy of pure
substance at
23. Entropy function S represents
24. In a reversible process, the
systems and surroundings
should remains at
25. Spontaneous process takes only
at
26. Carnot's cycle depends upon the
sucrose from solution
water
camphor
sucrose from solution
reversible
spontaneous
non-spontaneous
spontaneous
298 K & 1 atm
pressure
S = q/w
same pressure
295 K & 10 atm pressure
298K & 10 atm
pressure
S = q/T
different temperature
and pressure
298 K & 1 atm
pressure
S = q/T
same temperature
backward
direction
pressure of the
substance
isothermal
process
decreases
both forward and
backward direction
volume of the substance
only one direction
only one direction
working substance
temperature of heat
27. Entropy remains constant in
adiabatic process
isochoric process
isolated process
isothermal process
28. The entropy of a system in a
irreversible process
29. Choose the correct statement
increases
remains constant
none of these
increases
adiabatic process is
quasi-static
none of these
all reversible process
are quasistatic
increases
all reversible
process are
quasistatic
decreases
30. When water vapour condenses
into water its entropy
31. Entropy is measure of
32. Entropy is maximum in which
state
33. The area of the rectangle of the
T-S diagram represents____ in
a reversible Carnot’s cycle.
34. The 2nd law of
thermodynamics can be stated
in terms of____________of a
system.
35. A process, in which no heat is
supplied or rejected from the
system and entropy is not
constant, is called
remains unchanged
decreases
perfect order
solid
available energy
liquid
disorder
gas
first decreases and
then increases
none of these
can be any
external work done
internal work
done
increase in volume
increase in pressure
external work done
enthalpy
specific heat
temperature
entropy
entropy
isothermal
isentropic
polytropic
hyperbolic
polytrophic
isobaric
295 K & 1 atm
pressure
S= T/q
same temperature
forward direction
temperature of heat
all quasi-static process
are reversible
S=w/T
same temperature &
pressure
disorder
gas
24
36. In a reversible polytropic
process
37. A process, in which the
working substance neither
receives nor gives out heat to its
surroundings during its
expansion or contraction, is
called
38. Which of the following is a
characteristic of an adiabatic
process?
39. Work done in an adiabatic
process between a given pair of
end states depends on
40. Heat and work are
41. A container filled with a sample
of an ideal gas at the pressure of
1.5 atm. The gas is compressed
isothermally to one-fourth of its
original volume. What is the
new pressure of the gas?
42. The value of n = 1 in the
polytropic process indicates it
to be
enthalpy remains
constant
entropy remains
constant
isothermal process
ΔU = 0
isentropic
process
W=0
some heat transfer occurs
internal energy
remains constant.
entropy remains
constant
polytropic process
Q=0
adiabatic process.
ΔV = 0
isothermal process
Q=0
the end states only
particular
adiabatic process
the value of index n
the value of heat
transferred
the end states only
point functions
2 atm
system properties
3 atm
path functions
4 atm
intensive properties
5 atm
path functions
6 atm
reversible process
isothermal
process
adiabatic process
irreversible process
isothermal process
25