At very low temperatures, the heat capacity CV of a solid is:

\(\left( {12{\pi ^4}} \right)N{k_B}{\left( {\frac{T}{\theta }} \right)^3}\)

\(\left( {\frac{{12{\pi ^4}}}{5}} \right)N{k_B}{\left( {\frac{T}{\theta }} \right)^3}\)

\(\left( {12{\pi ^4}} \right)N{k_B}{\left( {\frac{T}{\theta }} \right)^3}\)

\(\left( {12{\pi ^4}} \right)N{k_B}{\left( {\frac{\theta }{T}} \right)^3}\)

\(\left( {\frac{{12{\pi ^4}}}{5}} \right)N{k_B}{\left( {\frac{\theta }{T}} \right)^3}\)

A solid is melted and allowed to cool and solidify again. The temperature is measured at equal interval of time. The graph below shows the change of temperature with time.The part of the curve that is practically horizontal is due to

Specific heat given away by the liquid

Latent heat given away by the liquid

Specific heat given away by the liquid

Thermal capacity changes with time keeping temperature constant

Change in density during transformation

A hollow Sphere of Mass 'M' and radius 'R' is rotating with an angular frequency of ω. It stops suddenly and the 75% of the Kinetic Energy is converted to heat. If 'S' is the specific heat of the material of sphere in S.I units, the rise in the temperature of the sphere is

\(\frac{{3{R^2}{\omega ^2}}}{{10S}}\)

\(\frac{{{R^2}{\omega ^2}}}{{4S}}\)

\(\frac{{3{R^2}{\omega ^2}}}{{10S}}\)

\(\frac{{{R^2}{\omega ^2}}}{{4JS}}\)

\(\frac{{2{R^2}{\omega ^2}}}{{3S}}\)

By what process is heat transmitted from the filament of an evacuated electric bulb to the glass?

Heat cannot be transmitted through vacuum

An iron ball at 60°C is dropped in a mug containing water at 60°C. The heat will

Flow from the iron ball to the water.

Not flow from iron ball to water or from water to iron ball.

Increase the temperature of both water and Iron ball

78 + Mcqs in Properties of Matter Page 2 McqOptions

51.	________ is not a type of heat transfer.A. DiffusionB. ReflectionC. ConvectionD. Radiation
A.	B
B.	A
C.	D
D.	C
Answer» B. A

Discussion

52.	How much heat (in kJ) would be required to melt a 50kg block of lead at its melting point? (Specific latent heat of melting for lead is 25000J/kg)
A.	1250
B.	5000
C.	125
D.	500
Answer» B. 5000

Discussion

53.	On the Fahrenheit scale, there are _______ equal intervals between the ice point and steam point of water.
A.	180
B.	273
C.	100
D.	212
Answer» B. 273

Discussion

54.	If a gas at 27°C is allowed to expand to thrice its original volume and pressure is halved then what will be its new temperature (in °C)?
A.	227
B.	450
C.	550
D.	177
Answer» E.

Discussion

55.	At very low temperatures, the heat capacity CV of a solid is:
A.	\(\left( {\frac{{12{\pi ^4}}}{5}} \right)N{k_B}{\left( {\frac{T}{\theta }} \right)^3}\)
B.	\(\left( {12{\pi ^4}} \right)N{k_B}{\left( {\frac{T}{\theta }} \right)^3}\)
C.	\(\left( {12{\pi ^4}} \right)N{k_B}{\left( {\frac{\theta }{T}} \right)^3}\)
D.	\(\left( {\frac{{12{\pi ^4}}}{5}} \right)N{k_B}{\left( {\frac{\theta }{T}} \right)^3}\)
Answer» B. \(\left( {12{\pi ^4}} \right)N{k_B}{\left( {\frac{T}{\theta }} \right)^3}\)

Discussion

56.	If 'ΔQ' stands for the amount of heat absorbed or rejected by a substance of mass 'm' when it undergoes a temperature change 'ΔT', then "ΔQ / (mΔT)" is equal to ____________.
A.	heat capacity
B.	molar heat capacity
C.	specific heat capacity
D.	molar specific heat capacity
Answer» D. molar specific heat capacity

Discussion

57.	A bucket full of hot water is kept in a room and it cools from 80°C to 70°C in time T1 minutes and from 70°C to 60°C in time T2 minutes. The relationship between T1 and T2 is
A.	T1 = T2
B.	T1 > T2
C.	T1 < T2
D.	T1 = T2 + 10
Answer» D. T1 = T2 + 10

Discussion

58.	Boltzmann Constant represents the variation of voltage with
A.	Current
B.	Resistance
C.	Pressure
D.	Temperature
Answer» D. Temperature

Discussion

59.	A rectangular metal plate 8 cm × 4 cm at 127°C emits E J/s. If both the length and breadth are halved and the temperature is raised to 327°C, the rate of emission is (J/s)
A.	\(\frac{27}{8}E\)
B.	\(\frac{81}{64} E\)
C.	\(\frac{10}{9} E\)
D.	\(\frac{9}{4} E\)
Answer» C. \(\frac{10}{9} E\)

Discussion

60.	212° Fahrenheit equals _________.
A.	373.15 K
B.	273.15 K
C.	89.6°C
D.	0°C
Answer» B. 273.15 K

Discussion

61.	A solid is melted and allowed to cool and solidify again. The temperature is measured at equal interval of time. The graph below shows the change of temperature with time.The part of the curve that is practically horizontal is due to
A.	Latent heat given away by the liquid
B.	Specific heat given away by the liquid
C.	Thermal capacity changes with time keeping temperature constant
D.	Change in density during transformation
Answer» B. Specific heat given away by the liquid

Discussion

62.	In temperature scale, 100 K =
A.	-279⋅67°F
B.	373⋅15°C
C.	-373⋅15°C
D.	212°F
Answer» B. 373⋅15°C

Discussion

63.	A wooden wagon wheel has an outside diameter of 3750 mm. The iron tire for this wheel is deliberately made smaller so that it can be shrunk in place to be a tight fit. If the tire's inside diameter is 3737 mm at 20°C, the temperature to which it must be heated to fit over the wheel? The coefficient of linear expansion of the steel is 1.2 × 10-5/°C.
A.	290°C
B.	20°C
C.	310°C
D.	270°C
Answer» B. 20°C

Discussion

64.	A hollow Sphere of Mass 'M' and radius 'R' is rotating with an angular frequency of ω. It stops suddenly and the 75% of the Kinetic Energy is converted to heat. If 'S' is the specific heat of the material of sphere in S.I units, the rise in the temperature of the sphere is
A.	\(\frac{{{R^2}{\omega ^2}}}{{4S}}\)
B.	\(\frac{{3{R^2}{\omega ^2}}}{{10S}}\)
C.	\(\frac{{{R^2}{\omega ^2}}}{{4JS}}\)
D.	\(\frac{{2{R^2}{\omega ^2}}}{{3S}}\)
Answer» B. \(\frac{{3{R^2}{\omega ^2}}}{{10S}}\)

Discussion

65.	A satellite at an altitude of 36,000 km above the Earth's surface loses its heat by means of
A.	Radiation
B.	Convection
C.	Conduction and radiation
D.	Convection and radiation
Answer» B. Convection

Discussion

66.	32° Fahrenheit equals?
A.	-273.15° C
B.	373.15 K
C.	0° C
D.	0 K
Answer» D. 0 K

Discussion

67.	At what wavelength does the radiation from a black body, kept at 300 K, maximize?
A.	9.6 x 10-5 m
B.	3.0 x 10-6 m
C.	3.0 x 10-5 m
D.	9.6 x 10-6 m
Answer» E.

Discussion

68.	A 10 kW drilling machine is used to drill a bore in a small aluminium block of mass 8 kg. Find the rise in temperature of the block in 2.5 minutes, assuming 50% power is used up in the heating machine itself or lost to the surroundings. (Specific heat of aluminium = 0.91 J g-1° C-1)
A.	103°C
B.	150°C
C.	206°C
D.	155°C
Answer» B. 150°C

Discussion

69.	By what process is heat transmitted from the filament of an evacuated electric bulb to the glass?
A.	Convection
B.	Radiation
C.	Conduction
D.	Heat cannot be transmitted through vacuum
Answer» C. Conduction

Discussion

70.	An ideal black body emits maximum intensity of radiation of wavelength 500 mm at temperature 1227°C. If its temperature is increased by 103 °C then the maximum emission wavelength will be
A.	300 nm
B.	350 nm
C.	410 nm
D.	425 nm
Answer» B. 350 nm

Discussion

71.	A solid iron ball is heated. which one of the following will have minimum percentage increase
A.	radius
B.	surface area
C.	volume
D.	density
Answer» E.

Discussion

72.	If 2000 J of heat is required to melt 80g of lead kept at its melting point, then what Latent Heat of Fusion of lead (in 105 J / kg)?
A.	0.4
B.	16
C.	1.6
D.	0.25
Answer» E.

Discussion

73.	An iron ball at 60°C is dropped in a mug containing water at 60°C. The heat will
A.	Flow from the iron ball to the water.
B.	Not flow from iron ball to water or from water to iron ball.
C.	Flow from water to iron ball
D.	Increase the temperature of both water and Iron ball
Answer» C. Flow from water to iron ball

Discussion

74.	If x is the temperature of a system in Kelvin and y is the temperature of the system in °C, then the correct relation between them is
A.	x = 273 - y
B.	x = 273 + y
C.	x = 173 + y
D.	x = 173 - y
Answer» C. x = 173 + y

Discussion

75.	If a certain amount of dry ice is mixed with same amount of water at 80°C, then the final temperature of the mixture is
A.	0°C
B.	40°C
C.	60°C
D.	80°C
Answer» B. 40°C

Discussion

76.	A person standing before a furnace receives most of the heat by
A.	Convection
B.	Conduction
C.	Radiation
D.	Conduction and convection
Answer» D. Conduction and convection

Discussion

77.	If the length of a 0.2m long aluminium rod expands by 0.5mm on increasing its temperature by 100°C, then find its Coefficient of linear expansion (in 10-5 K-1)?
A.	1
B.	25
C.	2.5
D.	10
Answer» D. 10

Discussion

78.	If a 1 km long steel rail suffers 50°C increase in temperature then by how much will be it's length in increase (in m)? (Coefficient of linear expansion for steel is 1.2 x 10-5 K-1)
A.	0.24
B.	0.06
C.	0.6
D.	0.024
Answer» D. 0.024

Discussion

Explore topic-wise MCQs in VITEEE.

________ is not a type of heat transfer.A. DiffusionB. ReflectionC. ConvectionD. Radiation

How much heat (in kJ) would be required to melt a 50kg block of lead at its melting point? (Specific latent heat of melting for lead is 25000J/kg)

On the Fahrenheit scale, there are _______ equal intervals between the ice point and steam point of water.

If a gas at 27°C is allowed to expand to thrice its original volume and pressure is halved then what will be its new temperature (in °C)?

At very low temperatures, the heat capacity CV of a solid is:

If 'ΔQ' stands for the amount of heat absorbed or rejected by a substance of mass 'm' when it undergoes a temperature change 'ΔT', then "ΔQ / (mΔT)" is equal to ____________.

A bucket full of hot water is kept in a room and it cools from 80°C to 70°C in time T1 minutes and from 70°C to 60°C in time T2 minutes. The relationship between T1 and T2 is

Boltzmann Constant represents the variation of voltage with

A rectangular metal plate 8 cm × 4 cm at 127°C emits E J/s. If both the length and breadth are halved and the temperature is raised to 327°C, the rate of emission is (J/s)

212° Fahrenheit equals _________.

A solid is melted and allowed to cool and solidify again. The temperature is measured at equal interval of time. The graph below shows the change of temperature with time.The part of the curve that is practically horizontal is due to

In temperature scale, 100 K =

A hollow Sphere of Mass 'M' and radius 'R' is rotating with an angular frequency of ω. It stops suddenly and the 75% of the Kinetic Energy is converted to heat. If 'S' is the specific heat of the material of sphere in S.I units, the rise in the temperature of the sphere is

A satellite at an altitude of 36,000 km above the Earth's surface loses its heat by means of

32° Fahrenheit equals?

At what wavelength does the radiation from a black body, kept at 300 K, maximize?

A 10 kW drilling machine is used to drill a bore in a small aluminium block of mass 8 kg. Find the rise in temperature of the block in 2.5 minutes, assuming 50% power is used up in the heating machine itself or lost to the surroundings. (Specific heat of aluminium = 0.91 J g-1° C-1)

By what process is heat transmitted from the filament of an evacuated electric bulb to the glass?

An ideal black body emits maximum intensity of radiation of wavelength 500 mm at temperature 1227°C. If its temperature is increased by 103 °C then the maximum emission wavelength will be

A solid iron ball is heated. which one of the following will have minimum percentage increase

If 2000 J of heat is required to melt 80g of lead kept at its melting point, then what Latent Heat of Fusion of lead (in 105 J / kg)?

An iron ball at 60°C is dropped in a mug containing water at 60°C. The heat will

If x is the temperature of a system in Kelvin and y is the temperature of the system in °C, then the correct relation between them is

If a certain amount of dry ice is mixed with same amount of water at 80°C, then the final temperature of the mixture is

A person standing before a furnace receives most of the heat by

If the length of a 0.2m long aluminium rod expands by 0.5mm on increasing its temperature by 100°C, then find its Coefficient of linear expansion (in 10-5 K-1)?

If a 1 km long steel rail suffers 50°C increase in temperature then by how much will be it's length in increase (in m)? (Coefficient of linear expansion for steel is 1.2 x 10-5 K-1)