Thermal Properties of Matter Test

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Thermal Properties of Matter Test - 38

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Weekly Quiz Competition

Question 1
1 / -0

The density of water at $$4^{\circ}C$$ is $$1000\:kg\:m^{-3}$$ and at $$104^{\circ}C$$ it is $$958.4\:kg\:m^{-3}$$. The cubic expansivity of water between these temperature is

A
$$4.16\times 10^{-5}(K)^{-1}$$

B
$$2.08\times 10^{-5}(^{\circ}C)^{-1}$$

C
$$4.16\times 10^{-4}(^{\circ}C)^{-1}$$

D
$$2.08\times 10^{-4}(K)^{-1}$$

Solution

$$\rho =\rho _{0}(1-\gamma \Delta T)$$
$$\therefore \displaystyle \gamma =\frac{\rho _{0}-\rho }{\rho _{0}\Delta T}=\frac{1000-958.4}{(100)(1000)}$$
$$=4.16\times 10^{-4}(^{\circ}C)^{-1}$$
Question 2
1 / -0

Two containers A and B contain liquid at 50C. Two metal balls one at 50C and the other at 30C are dropped in the containers A and B respectively. In which container will the transfer of heat take place?

A
$$B$$

B
$$A$$

C
$$A$$ & $$B$$

D
None of these

Solution

There will be no transfer heat in container A since both the liquid and the ball are at the same temperature.
Question 3
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A glass of cold water whose particles had a low average kinetic energy was placed on a table. The average kinetic energy in the cold water increased, while the average kinetic energy of the part of the table under the glass decreased. What do you think happened?

A
Thermal energy was transferred from the table to the glass of cold water.

B
Thermal energy was transferred from the glass of cold water to the table.

C
Entropy was transferred from glass of water to table

D
None of these.
Question 4
1 / -0

In the diagram shown, will the convection current be clockwise or anticlockwise on the left part of the figure?

A
Anticlockwise

B
Clockwise

C
Will keep on changing

D
Can't be said
Question 5
1 / -0

When the specific heat of a solid is measured by the method of mixture, the heat is lost to surroundings from the calorimeter by the process of

A
radiation

B
conduction

C
convection

D
both conduction and convection

Solution

Since the surface of the calorimeter is exposed to the surroundings, heat is lost from the surface by radiation.
Question 6
1 / -0

The amount of heat required to raise the temperature of 100g of copper (sp. heat = 390 J/kg$$^o$$ C) from $$40^o$$ to $$90^o$$ is

A
1950 J

B
2350 J

C
2550 J

D
None of these
Question 7
1 / -0

Thermal energy is always transferred from .............. to ............. temperatures

A
Lower, higher

B
Higher, lower

C
Both $$A$$ and $$B$$

D
Can't be determined

Solution
Question 8
1 / -0

A ........... is a device used to measure heat

A
Calorimeter

B
Barometer

C
Lactometer

D
None of these
Question 9
1 / -0

When you heat a bowl of water, we can observe that water starts circulating. This demonstrates:

A
conduction

B
convection

C
radiation

D
none

Solution

When you heat a bowl of water, we can observe that the water starts circulating. This is nothing but convection. As when water is heated, the water molecules above the surface of bowl is heated first; temperature increases and density decreases; and due to decrease in density; that water molecules goes up and water molecules present at brim goes down because of relatively more density. Due to this water circulates, this is convection.
Question 10
1 / -0

A gas behaves more closely like an ideal gas at

A
low pressure and low temperature

B
low pressure and high temperature

C
at all pressure and temperature

D
none of these

Solution

Due to low pressure, the size of molecules becomes less significant compared to the empty spaces between them.
Due to high temperature the potential energy due to inter-molecular forces becomes less significant compared with the particles kinetic energy.
As temperature increases the kinetic energy of particles.
Hence, the answer is low pressure and high temperature.

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Re-Attempt Weekly Quiz Competition

Thermal Properties of Matter Test - 38

Result

Thermal Properties of Matter Test - 38

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SHARING IS CARING

Question 1

$$4.16\times 10^{-5}(K)^{-1}$$

$$2.08\times 10^{-5}(^{\circ}C)^{-1}$$

$$4.16\times 10^{-4}(^{\circ}C)^{-1}$$

$$2.08\times 10^{-4}(K)^{-1}$$

Solution

Question 2

$$B$$

$$A$$

$$A$$ & $$B$$

None of these

Solution

Question 3

Thermal energy was transferred from the table to the glass of cold water.

Thermal energy was transferred from the glass of cold water to the table.

Entropy was transferred from glass of water to table

None of these.

Question 4

Anticlockwise

Clockwise

Will keep on changing

Can't be said

Question 5

radiation

conduction

convection

both conduction and convection

Solution

Question 6

1950 J

2350 J

2550 J

None of these

Question 7

Lower, higher

Higher, lower

Both $$A$$ and $$B$$

Can't be determined

Solution

Question 8

Calorimeter

Barometer

Lactometer

None of these

Question 9

conduction

convection

radiation

none

Solution

Question 10

low pressure and low temperature

low pressure and high temperature

at all pressure and temperature

none of these

Solution

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