Are these practice questions for Thermal Properties Of Matter based on the CBSE pattern?

Yes. Every practice question is modeled on the CBSE Class 11 - Science Physics exam pattern — including MCQs, assertion-reason questions, and short-answer formats that frequently appear in CBSE papers.

Are the practice questions for Thermal Properties Of Matter free?

Yes. Every chapter includes free practice questions for Class 11 - Science students to get you started.

What types of questions are included?

The practice set for Thermal Properties Of Matter mainly includes MCQs and CBSE-style short-answer questions, with instant feedback on each answer. For full-length textbook practice, use the NCERT Solutions page.

Are the practice questions suitable for board exam preparation?

Yes. The questions test the same concepts and depth that CBSE asks in board exams. After finishing, also solve the NCERT and NCERT Exemplar exercises for Thermal Properties Of Matter for full coverage.

How many practice questions are there for Thermal Properties Of Matter?

The number scales with chapter length and concept density. Each chapter typically has 15-50 practice questions across MCQ and short-answer formats.

Thermal Properties Of Matter Class 11 Physics Practice Questions with Answers

easy

A chef claims that food cooks faster in a pressure cooker because the increased pressure itself cooks the food. Critique this claim.

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easy

Calculate the amount of heat energy required to raise the temperature of

500 \text{ g}

of copper from

25^{\circ}\text{C}

to

125^{\circ}\text{C}

. The specific heat capacity of copper is

s = 386.4 \text{ J kg}^{-1}\text{K}^{-1}

.

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easy

List the three distinct modes of heat transfer.

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easy

Define latent heat of fusion (

L_f

).

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easy

An aluminum rod has a length of

2.0 \text{ m}

at an initial temperature of

20^{\circ}\text{C}

. Calculate its new length if it is heated to

100^{\circ}\text{C}

. The coefficient of linear expansion for aluminum is

\alpha_l = 2.5 \times 10^{-5} \text{ K}^{-1}

.

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easy

Recall the formula that relates the Celsius temperature scale (

t_C

) and the Fahrenheit temperature scale (

t_F

).

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easy

Justify why burns from steam at

100^{\circ} \text{C}

are more severe than burns from boiling water at the same temperature.

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easy

Calculate the temperature on the Fahrenheit scale corresponding to

25^\circ\text{C}

.

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easy

Recall the formula for the amount of heat (

Q

) required for a mass (

m

) of a substance to undergo a change of state.

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easy

Evaluate the statement: 'A body with a high thermal conductivity is always a poor thermal insulator.' Justify your evaluation with reference to the definition of thermal conductivity.

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easy

Recall the ideal-gas equation and identify each term in the equation.

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easy

Propose a method to reduce the thermal stress in long railway tracks during extreme summer heat, explaining the physics principle behind your proposal.

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easy

A

500

g block of an unknown metal absorbs

1.95 \times 10^4

J of heat, causing its temperature to rise from

25^\circ\text{C}

to

125^\circ\text{C}

. Solve for the specific heat capacity of the metal.

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easy

Contrast the mechanisms of heat transfer by conduction and convection, highlighting the key difference in how energy is transported in each process.

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easy

Critique the use of a standard mercury-in-glass thermometer for accurately measuring temperatures approaching absolute zero. Justify your reasoning based on the thermal properties of mercury.

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easy

Justify the anomalous expansion of water and explain its environmental significance for aquatic life.

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easy

Calculate the total heat required to completely melt

50 \text{ g}

of ice initially at

0^{\circ}\text{C}

. The latent heat of fusion of ice is

L_f = 3.33 \times 10^5 \text{ J kg}^{-1}

.

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easy

Examine why a person wearing dark-colored clothes feels warmer in the sun compared to a person wearing light-colored clothes.

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easy

Recall the ideal gas equation and name each variable and the constant involved.

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easy

A cylinder contains

2

moles of an ideal gas at a temperature of

27^\circ\text{C}

and a pressure of

1.5 \times 10^5

Pa. Calculate the volume of the gas. (Universal gas constant

R = 8.31 \text{ J mol}^{-1} \text{K}^{-1}

).

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easy

Recall the mathematical relationship used to convert a temperature from the Celsius scale (

t_C

) to the Fahrenheit scale (

t_F

).

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easy

Justify why burns from steam at

100^{\circ}\text{C}

are generally more severe than burns from boiling water at the same temperature.

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easy

Justify why water is an excellent coolant for automobile radiators compared to an oil with a specific heat capacity of

1965 \text{ J kg}^{-1} \text{ K}^{-1}

.

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easy

Define specific heat capacity and state its SI unit.

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easy

Define heat.

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easy

Name the SI unit of temperature and define absolute zero.

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easy

Define heat and temperature, and state the SI unit for each.

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medium

A hollow metal sphere is heated uniformly. Evaluate how the volume of the empty cavity inside the sphere changes. Justify your conclusion using the principles of thermal expansion.

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medium

Describe the key differences between the heat transfer mechanisms of conduction and convection.

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medium

Formulate a complete heat budget calculation to determine the total heat energy (

Q_{total}

) required to convert

m

kg of ice initially at

-T_1^{\circ}\text{C}

to steam at

T_2^{\circ}\text{C}

(where

T_2 > 100

). Define all variables and create a step-by-step expression for the total heat.

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medium

Compare the amount of energy required to melt

1

kg of ice at

0^\circ\text{C}

with the energy required to vaporize

1

kg of water at

100^\circ\text{C}

. Analyze why burns from steam are generally more severe than burns from boiling water. (Use

L_f = 3.33 \times 10^5 \text{ J kg}^{-1}

and

L_v = 22.6 \times 10^5 \text{ J kg}^{-1}

).

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medium

Define specific heat capacity and state its SI unit.

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medium

Two spheres made of the same material have radii in the ratio

1:2

. If they are maintained at the same absolute temperature, compare the rates at which they radiate energy.

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medium

Analyze why a bimetallic strip made of steel and brass bends when heated, with the brass on the outer side of the curve. Use the coefficients of linear expansion to support your answer (

\alpha_{\text{steel}} = 1.2 \times 10^{-5} \text{ K}^{-1}

,

\alpha_{\text{brass}} = 1.8 \times 10^{-5} \text{ K}^{-1}

).

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medium

Calculate the temperature at which the reading on the Fahrenheit scale is exactly double the reading on the Celsius scale.

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medium

Design a setup to demonstrate the phenomenon of regelation. Propose an explanation for why the wire passes through the ice without cutting it in half.

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medium

A spherical blackbody with a radius of

5

cm is maintained at a temperature of

500

K. Calculate the total power radiated by the sphere. (Stefan-Boltzmann constant

\sigma = 5.67 \times 10^{-8} \text{ W m}^{-2} \text{K}^{-4}

).

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medium

Analyze the consequence of water's anomalous expansion on aquatic life in cold climates. Explain what would happen if water did not exhibit this property.

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medium

Design a simple, cost-effective solar water heater. Create a basic diagram and justify the choice of materials for the main components based on the principles of heat transfer.

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medium

A new temperature scale, the 'Z-scale' (Z), is proposed. On this scale, the freezing point of water is

50

Z and the boiling point is

250

Z. Formulate the conversion equation between the Z-scale temperature (

T_Z

) and the Celsius scale temperature (

t_C

).

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medium

Explain the principle of calorimetry.

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medium

A student finds that the cooling curve for a body initially at

150^{\circ} \text{C}

in a room at

25^{\circ} \text{C}

is not a perfect exponential decay. Critique the student's assumption that Newton's law of cooling should be perfectly accurate in this scenario.

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medium

Explain why land breezes and sea breezes occur in coastal areas.

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medium

A body cools from

80^\circ\text{C}

to

70^\circ\text{C}

in 5 minutes. If the temperature of the surroundings is

20^\circ\text{C}

, apply Newton's law of cooling to calculate the time it will take to cool from

60^\circ\text{C}

to

50^\circ\text{C}

.

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medium

Design an experiment to determine the coefficient of linear expansion,

\alpha_l

, for an unknown metal rod. Justify your choice of apparatus and the procedure to ensure accuracy.

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medium

The radiation emitted from a distant star has a peak intensity at a wavelength of

500 \text{ nm}

. Apply Wien's displacement law to calculate the surface temperature of the star. (Wien's constant

b = 2.9 \times 10^{-3} \text{ m K}

).

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medium

Analyze why land heats up faster than the sea during the daytime, leading to the formation of a sea breeze.

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medium

A sample of gas has a volume of

2.0 \text{ L}

at a pressure of

1.0 \times 10^5 \text{ Pa}

and a temperature of

27^{\circ}\text{C}

. Apply the combined gas law to find its volume if the pressure is increased to

2.0 \times 10^5 \text{ Pa}

and the temperature is increased to

127^{\circ}\text{C}

.

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medium

Compare the severity of a burn caused by

1 \text{ g}

of steam at

100^{\circ}\text{C}

with a burn caused by

1 \text{ g}

of boiling water at

100^{\circ}\text{C}

.

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medium

Two rods, one of copper and one of steel, of the same length and cross-section, are joined end-to-end. The free end of the copper is at

100^{\circ} \text{C}

and the free end of the steel is at

0^{\circ} \text{C}

. Critique the assumption that the temperature gradient (change in temperature per unit length) will be the same in both rods.

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medium

Define thermal conductivity and state its SI unit.

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medium

Explain why a blacksmith heats an iron ring before fitting it onto the rim of a wooden wheel.

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medium

Formulate a hypothesis explaining why cooking is faster in a pressure cooker, especially at high altitudes. Your explanation must connect boiling point, pressure, and heat transfer.

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medium

Summarize the three modes of heat transfer: conduction, convection, and radiation. Describe the primary mechanism for each.

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medium

A composite rod is made by joining an aluminum rod of length

20

cm and a copper rod of length

20

cm. Both rods have the same cross-sectional area. The free end of the aluminum rod is maintained at

100^\circ\text{C}

and the free end of the copper rod is at

0^\circ\text{C}

. Solve for the temperature at the junction of the two rods in the steady state. (Thermal conductivity of Al,

K_{\text{Al}} = 205 \text{ W m}^{-1} \text{K}^{-1}

; Thermal conductivity of Cu,

K_{\text{Cu}} = 385 \text{ W m}^{-1} \text{K}^{-1}

).

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medium

Design an investigation to compare the emissivities of a polished silver surface, a matte black surface, and a white painted surface. Explain how you would evaluate the results.

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medium

A body cools from

80^{\circ}\text{C}

to

70^{\circ}\text{C}

in 5 minutes. The temperature of the surroundings is

30^{\circ}\text{C}

. Solve for the time it will take to cool from

60^{\circ}\text{C}

to

50^{\circ}\text{C}

, assuming Newton's law of cooling is applicable.

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medium

Explain the concept of thermal expansion in solids, mentioning the three types.

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medium

Analyze how the anomalous expansion of water, specifically its maximum density at

4^{\circ}\text{C}

, is crucial for the survival of aquatic life in lakes and ponds in cold climates.

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medium

Summarize Newton's law of cooling and provide its mathematical expression.

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medium

Explain why a blacksmith heats an iron ring before fitting it onto a wooden wheel.

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medium

A student proposes using alcohol instead of mercury in a thermometer designed for high-temperature measurements in a laboratory furnace, which can reach up to

500^{\circ}\text{C}

. Critique this proposal, evaluating the suitability of alcohol for this purpose.

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medium

Recall Newton's law of cooling and explain the relationship it describes.

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medium

Design a simple, low-cost solar water heater for domestic use. Propose materials for the key components and justify your choices based on the principles of heat transfer.

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medium

Explain the fundamental principle of calorimetry.

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medium

Propose a design modification for a standard calorimeter to further minimize heat loss by radiation, beyond just having polished surfaces. Justify your proposal.

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medium

Analyze why large bodies of water, like oceans, have a moderating effect on the climate of nearby land areas, based on the concept of specific heat capacity.

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medium

Two rods, one of copper and one of steel, have the same length and cross-sectional area. They are joined end-to-end. The free end of the copper rod is at

100^{\circ}\text{C}

and the free end of the steel rod is at

0^{\circ}\text{C}

. Evaluate which rod will have a steeper temperature gradient. Justify your answer.

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medium

Justify the statement: 'The anomalous expansion of water is crucial for the survival of aquatic life in cold climates.' Formulate an argument explaining the physical processes involved.

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medium

Define the coefficient of linear expansion (

\alpha_l

) and state its SI unit.

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medium

Explain what is meant by the latent heat of fusion.

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medium

Describe the concepts of melting point and boiling point. Explain why the temperature of a substance remains constant during a change of state.

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medium

A custom temperature scale, the X scale, is defined such that the freezing point of water is

0^\circ \text{X}

and the boiling point is

150^\circ \text{X}

. Calculate the temperature in degrees Celsius that corresponds to

60^\circ \text{X}

.

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hard

Calculate the total amount of heat energy required to convert

50

g of ice at

-10^\circ\text{C}

to steam at

100^\circ\text{C}

. (Given:

s_{\text{ice}} = 2100 \text{ J kg}^{-1} \text{K}^{-1}

,

s_{\text{water}} = 4186 \text{ J kg}^{-1} \text{K}^{-1}

,

L_f = 3.35 \times 10^5 \text{ J kg}^{-1}

,

L_v = 2.256 \times 10^6 \text{ J kg}^{-1}

).

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hard

A manufacturer claims their new insulating material, 'ThermaBlock,' has a thermal conductivity of

0.001 \text{ J s}^{-1} \text{m}^{-1} \text{K}^{-1}

. Evaluate the feasibility of this claim by comparing it to the thermal conductivity of air.

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hard

What is a blackbody? Summarize Wien's Displacement Law for blackbody radiation.

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hard

Analyze how a bimetallic strip, made of steel and brass bonded together, functions as a thermal switch in a thermostat. Contrast its behavior when heated versus when cooled, given that the coefficient of linear expansion of brass (

\alpha_{brass} = 1.8 \times 10^{-5} \text{ K}^{-1}

) is greater than that of steel (

\alpha_{steel} = 1.2 \times 10^{-5} \text{ K}^{-1}

).

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hard

An engineer proposes building a bridge with single

20 \text{ m}

steel beams without any expansion joints. Evaluate this proposal for a region where temperature varies from

-10^{\circ} \text{C}

to

40^{\circ} \text{C}

. Calculate the thermal stress that would develop if the beam were rigidly fixed. Given: Young's modulus for steel

Y_{\text{steel}} = 2 \times 10^{11} \text{ N/m}^2

, and coefficient of linear expansion

\alpha_{\text{steel}} = 1.2 \times 10^{-5} \text{ K}^{-1}

.

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hard

Design an experiment to determine the coefficient of linear expansion (

\alpha_l

) of an unknown metal rod. Justify the choice of apparatus and the procedure you would follow to ensure accuracy.

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hard

A

200

g copper block at

90^\circ\text{C}

is placed in a

100

g copper calorimeter containing

250

g of water at

10^\circ\text{C}

. Assuming no heat is lost to the surroundings, calculate the final equilibrium temperature of the mixture. (Specific heat of copper

s_{\text{cu}} = 386 \text{ J kg}^{-1} \text{K}^{-1}

, specific heat of water

s_{\text{w}} = 4186 \text{ J kg}^{-1} \text{K}^{-1}

).

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hard

Propose a method to determine the latent heat of vaporization (

L_v

) of an unknown liquid whose boiling point is approximately

80^{\circ} \text{C}

. Formulate the final equation for the calculation.

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hard

Describe the anomalous expansion of water and explain its importance for aquatic life in cold climates.

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hard

Formulate a mathematical model to calculate the final equilibrium temperature when a hot metal block of mass

m_1

, specific heat capacity

s_1

, and initial temperature

T_1

is dropped into a calorimeter of mass

m_c

, specific heat capacity

s_c

, containing a liquid of mass

m_2

, specific heat capacity

s_2

, at an initial temperature

T_2

(where

T_1 > T_2

). Propose the necessary assumptions for your model.

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hard

A

200 \text{ g}

piece of iron at

90^{\circ}\text{C}

is dropped into a

100 \text{ g}

copper calorimeter containing

250 \text{ g}

of water at

10^{\circ}\text{C}

. Solve for the final equilibrium temperature of the mixture, assuming no heat is lost to the surroundings. (Specific heat of iron

s_{iron} = 450 \text{ J kg}^{-1}\text{K}^{-1}

, copper

s_{cu} = 386 \text{ J kg}^{-1}\text{K}^{-1}

, and water

s_{water} = 4186 \text{ J kg}^{-1}\text{K}^{-1}

)

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hard

Describe the anomalous behavior of water and explain its environmental significance.

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hard

A steel rod of length

1.5 \text{ m}

and cross-sectional area

2.0 \times 10^{-4} \text{ m}^2

is rigidly fixed between two supports. If the temperature is raised by

50^{\circ}\text{C}

, calculate the compressive stress developed in the rod. (Coefficient of linear expansion of steel

\alpha_{steel} = 1.2 \times 10^{-5} \text{ K}^{-1}

, Young's modulus of steel

Y_{steel} = 2.0 \times 10^{11} \text{ N m}^{-2}

)

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hard

A steel rail of length

10

m is laid on a railway track at a temperature of

20^\circ\text{C}

. Calculate the expansion gap that must be left between two rails to prevent buckling when the temperature rises to

50^\circ\text{C}

. If no gap is left, calculate the thermal stress developed. (Given

\alpha_{\text{steel}} = 1.2 \times 10^{-5} \text{ K}^{-1}

and Young's modulus

Y_{\text{steel}} = 2 \times 10^{11} \text{ N m}^{-2}

).

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hard

A student performs an experiment to verify Newton's law of cooling. They plot a graph of temperature (

T

) versus time (

t

) and find it is an exponential decay curve, not a straight line. They conclude that Newton's law is incorrect. Critique the student's conclusion and propose the correct graphical analysis.

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hard

An engineer needs to create a composite bar with a specific equivalent thermal conductivity. The bar is made by soldering two rods of different materials (Material A and Material B) end-to-end (in series). Both rods have the same length

L

and cross-sectional area

A

. Formulate a general expression for the equivalent thermal conductivity

K_{eq}

of the composite bar in terms of the thermal conductivities

K_A

and

K_B

.

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hard

Two rods, one of copper and one of steel, have the same length

L

and the same cross-sectional area

A

. They are joined end-to-end. The free end of the copper rod is maintained at

100^{\circ}\text{C}

and the free end of the steel rod is at

0^{\circ}\text{C}

. Calculate the temperature at the junction of the two rods. (Thermal conductivity of copper

K_{cu} = 385 \text{ W m}^{-1}\text{K}^{-1}

, and steel

K_{steel} = 50.2 \text{ W m}^{-1}\text{K}^{-1}

)

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Thermal Properties Of MatterClass 11 Physics Practice Questions