Thermal Properties of Matter Test

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Thermal Properties of Matter Test - 20

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Weekly Quiz Competition

Question 1
1 / -0

The thermos bottles have a highly polished interior made of stainless steel, which makes them almost unbreakable. These thermos bottles also covered with insulated material to keep substances hot by reducing heat loss. Identify which of the following mode of heat transfer is restricted by the insulated material ?

A
Absorption

B
Conduction

C
Convection

D
Radiation

E
Evaporation

Solution

A vacuum flask, or thermos, does not allow heat transfer by any of the three ways that heat can travel. The silver coating on the inner bottle prevents heat transfer by radiation, and the vacuum between its double wall prevents heat moving by convection. The thinness of the glass walls stops heat entering or leaving the flask by conduction. The case surrounding the flask provides additional insulation.
Question 2
1 / -0

When you approach fire, you feel heat on your body. Which of the following mode of heat transfer is involved in this ?

A
Conduction

B
Convection

C
Radiation

D
Thermal expansion

E
Specific heat

Solution

Heat radiation is the transfer of energy, in the form of electromagnetic waves, through space. The heat emitted from fire, is transmitted through space in the form of radiation. Hence, when you approach fire, you feel heat on your body.
.
This is the reason that, when facing the fire, only the front is warmed. The backside is not warmed until the person turns around.

The more you go closer to the fire, more the amount of radiation is received.
Question 3
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Find out the temperature of absolute zero kelvin.

A
$$0^oC$$

B
$$100^oC$$

C
$$273^oC$$

D
$$-273^oC$$

E
$$-100^oC$$

Solution

By definition, Zero kelvin ($$0K$$) is equal to $$- 273^o C$$.
Question 4
1 / -0

Which of the following is possessed by radiant energy?

A
vibrating particles.

B
heat.

C
objects held at an elevated position.

D
objects as they rub against each other.

E
chemical bonds between atoms in a molecule

Solution

Radiant energy is the energy that travels by waves or particles, particularly electromagnetic radiation such as heat or x-rays. Since energy is associated with the speed of the particles, it is the heat that it possess in other words.
Question 5
1 / -0

In the convection process rate of heat transfer is compared in the option between gas and liquid, choose the correct statement

A
Gas convects more as compared to other

B
Liquid convects more as compared to other

C
Liquid convects more as compared to other only if certain factors assists water

D
None of the above

Solution

In liquids, particles are neither too close nor too far but comparatively closer than gas; so liquid convects more as compared to gas. At $$0^{\circ}C$$ and $$4^{\circ}C$$ when density is more; the rate of convection decreases. But when the density of water is normal i.e. at room temperature, the convection rate of water is pretty good. Density only affects the rate of convection.
Question 6
1 / -0

Density of water is maximum at

A
$$0$$

B
$$4$$

C
$$4 K$$

D
$$100$$

Solution

Density of water is maximum at $$4^{\circ} C$$. This ia a fact.
Question 7
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Which of the following is NOT a Absolute Temperature Scale?

A
Celsius Scale

B
Rankine Scale

C
Kelvin Scale

D
None of these

Solution

An absolute scale is that in which , measurement starts from a minimum or zero point and which progresses in only one direction. For temperature measurement , Kelvin (related to Celsius scale) and Rankine (related to Fahrenheit scale) scales are absolute temperature scales .As they starts from a point at which molecular motion ceases ,absolute zero point .
Celsius scale starts from the freezing point of water hence it is a relative scale , not an absolute temperature scale ..
Question 8
1 / -0

At Absolute Zero Temperature, :

A
Molecular Energy is Zero

B
Molecular Energy is maximum

C
Molecular Energy is minimum

D
None of these

Solution

At absolute zero temperature , the $$v_{rms}$$ of molecules becomes zero , as $$v_{rms}\propto \sqrt T$$. Hence , molecules have only potential energy due to this molecular energy (K+U) becomes minimum .
Question 9
1 / -0

Water from $$4^0 C$$ to $$0^0C$$

A
expands

B
contracts

C
starts to turn into ice

D
none of these

Solution

The volume decreases normally from room temperature down to $$4^{0}C $$, just like we would expect, but as the temperature falls further, the molecules tend to form hydrogen bonds, and push away neighbouring molecules that are too close for comfort.
So as water goes from $$4^{0}C$$ to $$0^{0}C$$ , it expands
therefore option $$A$$ is correct
Question 10
1 / -0

Absolute zero on kelvin scale is equal to

A
$$273K$$

B
$$0K$$

C
$$373K$$

D
$$15K$$

Solution

Absolute zero on Kelvin scale is $$0K$$ , the lowest temperature possible .

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Re-Attempt Weekly Quiz Competition

Thermal Properties of Matter Test - 20

Result

Thermal Properties of Matter Test - 20

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SHARING IS CARING

Question 1

Absorption

Conduction

Convection

Radiation

Evaporation

Solution

Question 2

Conduction

Convection

Radiation

Thermal expansion

Specific heat

Solution

Question 3

$$0^oC$$

$$100^oC$$

$$273^oC$$

$$-273^oC$$

$$-100^oC$$

Solution

Question 4

vibrating particles.

heat.

objects held at an elevated position.

objects as they rub against each other.

chemical bonds between atoms in a molecule

Solution

Question 5

Gas convects more as compared to other

Liquid convects more as compared to other

Liquid convects more as compared to other only if certain factors assists water

None of the above

Solution

Question 6

$$0$$

$$4$$

$$4 K$$

$$100$$

Solution

Question 7

Celsius Scale

Rankine Scale

Kelvin Scale

None of these

Solution

Question 8

Molecular Energy is Zero

Molecular Energy is maximum

Molecular Energy is minimum

None of these

Solution

Question 9

expands

contracts

starts to turn into ice

none of these

Solution

Question 10

$$273K$$

$$0K$$

$$373K$$

$$15K$$

Solution

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