Thermal Physics - Tamil Nadu Board STD 10 Science Questions

Q 1Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.1 Mark

When 1 kg of water at 100°C is mixed with 1 kg of water at 65°C, the temperature of the mixture is:

A
Less than 100°C
B
Less 100°C
C
Equal to 100°C
✓
Less than 100°C but more than 65°C

Answer: D.

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Q 2Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.1 Mark

When ice melts its volume:

A
Increases
B
Changes
✓
Decreases
D
Remains same

Answer: C.

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Q 3Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.1 Mark

Process of transfer of heat in the form of electromagnetic wave (light) for which material medium not necessary is _____.

A
conduction
✓
radiation
C
convection
D
none of these.

Answer: B.

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Q 4Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.1 Mark

Amount of heat required to convert 10 g of ice at 0°C, into water at same temperature is:

A
3000 J
✓
336 J
C
300 J
D
3360 J

Answer: B.

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Q 5Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.1 Mark

Transfer of heat from the hot end to cold end with out-migration of a molecule of solid is called _____.

A
convection
✓
conduction
C
Radiation
D
none of these.

Answer: B.

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Q 6Fill in the blank1 Mark

H2 gas can behave like an ideal gas at ______ pressure and _____ temperature.

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Q 7Fill in the blank1 Mark

The relation between N (no. of molecules), P, V & T is _____.

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Q 8Fill in the blank1 Mark

As pressure on a gas increases the P.E. between molecules of gas _____.

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Q 9Fill in the blank1 Mark

As K.E. of the gas increases then the _____ increases.

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Q 10Fill in the blank1 Mark

The nature of graph of $P$ versus $\left(\frac{1}{V}\right)$ for the given mass of gas at constant temperature is

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Q 11True-False1 Mark

The real expansion of a liquid is equal to the difference between apparent expansion and expansion of the vessel.

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Q 12True-False1 Mark

The S.I. unit of coefficient of thermal expansion is per kelvin.

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Q 13True-False1 Mark

If Q calorie heat is produced by spending mechanical work W then the mechanical equivalent of heat J = W × Q?

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Q 14True-False1 Mark

A gas which obeys the relation PV = nRT at all temperature and pressure is called real gas.

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Q 15True-False1 Mark

Number of molecules N in gas is equal to the product of the number of mole (n) of gas and Avogadro’s number (NA)?

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Q 16Assertion & Reason1 Mark

Assertion: There are no effects on other ends when one end of the rod is only heated.
Reason: Heat always flows from a region of higher temperature to lower the temperature of the rod.

A
Both the assertion and the reason are true and the reason is the correct explanation of assertion.
B
Both the assertion and the reason are true but the reason is not the correct explanation of the assertion.
C
Assertion is true but the reason is false.
✓
Assertion is false but the reason is true.

Answer: D.

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Q 17Assertion & Reason1 Mark

Assertion: Real expansion in liquids is always larger than apparent expansion.
Reason: Vessel of liquid expands 1st then the expansion of liquid in the vessel.

✓
Both the assertion and the reason are true and the reason is the correct explanation of assertion.
B
Both the assertion and the reason are true but the reason is not the correct explanation of the assertion.
C
Assertion is true but the reason is false.
D
Assertion is false but the reason is true.

Answer: A.

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Q 18Assertion & Reason1 Mark

Assertion: As the temperature of a gas increases the K.E of molecules increases, but P.E. decreases.
Reason: Due to the law of conservation of energy.

✓
Both the assertion and the reason are true and the reason is the correct explanation of assertion.
B
Both the assertion and the reason are true but the reason is not the correct explanation of the assertion.
C
Assertion is true but the reason is false.
D
Assertion is false but the reason is true.

Answer: A.

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Q 19Assertion & Reason1 Mark

Assertion: Air at some distance above the fire is hotter than the same distance sidewise.
Reason: Air surrounding the fire carries heat upward due to conventional current.

A
Both the assertion and the reason are true and the reason is the correct explanation of assertion.
✓
Both the assertion and the reason are true but the reason is not the correct explanation of the assertion.
C
Assertion is true but the reason is false.
D
Assertion is false but the reason is true.

Answer: B.

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Q 20Assertion & Reason1 Mark

Assertion: Good conductors of heat are also a good conductor of electricity and vice-versa
Reason: Mainly electrons are responsible for there conduction.

✓
Both the assertion and the reason are true and the reason is the correct explanation of assertion.
B
Both the assertion and the reason are true but the reason is not the correct explanation of the assertion.
C
Assertion is true but the reason is false.
D
Assertion is false but the reason is true.

Answer: A.

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Q 21[1 Mark Questions]1 Mark

Define co-efficient of linear expansion. State its unit.

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Q 22[1 Mark Questions]1 Mark

Differentiate between conduction, convection and radiation.

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Q 23[1 Mark Questions]1 Mark

Mention different types of expansion.

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Q 24[1 Mark Questions]1 Mark

At what temperature does all molecular motion cease? Explain.

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Q 25[1 Mark Questions]1 Mark

Define one Kilocalorie.

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Q 26[2 Mark Questions]2 Marks

In the upper atmosphere, the kinetic temperature of the air is of the order of 1000 K even then one feels severe cold in these places. Why?

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Q 27[2 Mark Questions]2 Marks

What are the characteristic feature of transfer of heat energy?

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Q 28[2 Mark Questions]2 Marks

Why do the ventilators provide near the ceiling of the classroom?

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Q 29[2 Mark Questions]2 Marks

The surroundings above a fire is hotter than the surroundings below the fire. Why?

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Q 30[2 Mark Questions]2 Marks

Can you boil water in a paper cup? Explain.

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Q 31[4 Mark Questions]4 Marks

If the volume of a metallic block increases by 0.12% when it is heated through 20°C, what is the coefficient of cubical expansion.

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Q 32[4 Mark Questions]4 Marks

If the volume of a block of metal changes by 12% when it is heated by 30°C. What is the coefficient of linear expansion, superficial expansion?

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Q 33[4 Mark Questions]4 Marks

Convert $323 K$ to ${ }^{\circ} C$.

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Q 34[4 Mark Questions]4 Marks

A constant volume thermometer using the gas reads a pressure of 1.75 × 104 Pa at normal freezing of water and reads 2.39 × 104 pa at normal boiling point of water. Obtained from the observation the temperature of absolute zero on the Celcius scale.

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Q 35[4 Mark Questions]4 Marks

At what temperature the value of Celcius and Fahrenheit scale coincide.

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Q 36Match The Following.4 Marks

1. Boyle’s Law	(a) KB=Rn
2. Absolute Scale	(b) V ∝ t
3. Charle’s Law	(c) P∝1V
4. Boltzmann Constant	(d) V ∝ n
5. Avogadro’s Law	(e) 0 K (zero kelvin)

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Q 37Match The Following.4 Marks

1. Heat	(a) Joule
2. Thermometer	(b) Heating
3. The SI unit of heat	(c) Temperature
4. Cool a cup of coffee, adding cold milk	(d) Energy
5. gain by heat by a body	(e) thermal equilibrium

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Thermal Physics Science - Thermal Physics

Thermal Physics question types

Thermal Physics questions

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