Thermal Properties of Matter NEET MCQ

1. Which of the following does NOT depend on the temperature of the substance?

a) Thermal Capacity
b) Specific Heat
c) Thermal Expansion
d) Thermal Conductivity

Answer:

d) Thermal Conductivity

Explanation:

Thermal conductivity of a material is a measure of its ability to conduct heat and is generally independent of its temperature.

2. Which law states that the pressure of a given mass of gas is directly proportional to its absolute temperature when the volume is kept constant?

a) Boyle's Law
b) Charles' Law
c) Gay-Lussac's Law
d) Avogadro's Law

Answer:

b) Charles' Law

Explanation:

Charles' Law (or volume law) states that volume of a gas is directly proportional to its absolute temperature, keeping the pressure constant. However, when volume is constant, it is also termed as Gay-Lussac's Law.

3. The coefficient of volume expansion is equal to _______ times the coefficient of linear expansion.

a) 2
b) 3
c) 1/2
d) 1/3

Answer:

b) 3

Explanation:

Coefficient of volume expansion (β) is approximately three times the coefficient of linear expansion (α) for solids.

4. A bimetallic strip is made of aluminum and brass. On heating, it will:

a) Bend with aluminum on the outer side
b) Bend with brass on the outer side
c) Remain straight
d) Bend first towards aluminum and then towards brass

Answer:

a) Bend with aluminum on the outer side

Explanation:

Aluminum has a higher coefficient of linear expansion than brass. Therefore, upon heating, aluminum will expand more, causing the strip to bend with aluminum on the outer side.

5. Which of the following substances has the maximum specific heat?

a) Water
b) Iron
c) Copper
d) Mercury

Answer:

a) Water

Explanation:

Among the given substances, water has the highest specific heat.

6. If two objects are in thermal equilibrium with a third object, they are in thermal equilibrium with each other. This statement is:

a) First law of thermodynamics
b) Zeroth law of thermodynamics
c) Second law of thermodynamics
d) Third law of thermodynamics

Answer:

b) Zeroth law of thermodynamics

Explanation:

The stated principle is known as the Zeroth law of thermodynamics.

7. In an adiabatic process:

a) Temperature remains constant
b) Pressure remains constant
c) Volume remains constant
d) There is no heat transfer

Answer:

d) There is no heat transfer

Explanation:

An adiabatic process is one in which no heat enters or leaves the system.

8. Which of the following is NOT a good conductor of heat?

a) Silver
b) Copper
c) Aluminum
d) Wood

Answer:

d) Wood

Explanation:

Wood is an insulator and does not conduct heat effectively.

9. The S.I. unit of thermal conductivity is:

a) J/s.m.°C
b) W/m.°C
c) J/m.°C
d) W.s/m.°C

Answer:

b) W/m.°C

Explanation:

The S.I. unit of thermal conductivity is Watts per meter Kelvin (W/m.K) or W/m.°C.

10. An ideal gas undergoes isothermal expansion. This means the gas:

a) Expands at constant temperature
b) Expands at constant pressure
c) Expands at constant volume
d) Does not expand

Answer:

a) Expands at constant temperature

Explanation:

Isothermal means constant temperature. Thus, during isothermal expansion, the temperature of the gas remains constant.

11. Calorimetry is the science associated with:

a) Measuring temperature
b) Measuring pressure
c) Measuring heat
d) Measuring volume

Answer:

c) Measuring heat

Explanation:

Calorimetry deals with the measurements and study of heat changes during physical or chemical processes.

12. Latent heat of fusion is the heat required to:

a) Convert solid to liquid without any temperature change
b) Convert liquid to gas without any temperature change
c) Raise the temperature of a substance
d) Lower the temperature of a substance

Answer:

a) Convert solid to liquid without any temperature change

Explanation:

Latent heat of fusion is the heat needed to change a substance from solid to liquid phase at its melting point without any change in temperature.

13. Which of the following does NOT affect the thermal resistance of a material?

a) Length of the material
b) Cross-sectional area of the material
c) Type of material
d) Color of the material

Answer:

d) Color of the material

Explanation:

Thermal resistance depends on the physical properties and dimensions of the material, not on its color.

14. The heat capacity of a system which has entropy of zero at absolute zero temperature is:

a) Infinite
b) Zero
c) Negative
d) Positive

Answer:

b) Zero

Explanation:

According to the third law of thermodynamics, the heat capacity of a system becomes zero as the temperature approaches absolute zero.

15. In an isobaric process:

a) Temperature remains constant
b) Pressure remains constant
c) Volume remains constant
d) Heat remains constant

Answer:

b) Pressure remains constant

Explanation:

An isobaric process is one in which the pressure remains constant.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top