Thermal Properties of Matter Test

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Thermal Properties of Matter Test - 14

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Weekly Quiz Competition

Question 1
1 / -0

The perfect gas equation for 4 gram of hydrogen gas is :

A
$$PV=RT$$

B
$$PV= 2RT$$

C
$$PV$$ = $$\displaystyle\ \frac{1}{2} RT$$

D
$$PV = 4RT$$

Solution

$$n$$ = $$\displaystyle\ \frac{4}{2} = 2$$ (number of moles)
$$\Rightarrow PV=2RT$$
Question 2
1 / -0

The deviation of gases from the behaviour of ideal gas is due to :

A
colourless molecules

B
covalent bonding of molecules

C
attraction of molecules

D
absolute scale of temperature

Solution

For ideal behaviour we assume there is no attractive force between molecules of gas but there is an attractive force which produces non ideality.
Hence, option(C)
Question 3
1 / -0

Absolute zero is obtained from

A
$$P - V$$ graph

B
$$P - \displaystyle{\frac{1}{V}}$$ graph

C
$$P - T$$ graph

D
$$V - T$$ graph

Solution

$$P\propto T$$ If $$V$$ is constant, where $$P$$ is pressure of certain amount of gas and $$T$$ is absolute zero temperature.
Question 4
1 / -0

The solar heat and light reach the earth via

A
radiation

B
conduction

C
convection

D
all of these

Solution

Radiation does not require any medium to transfer energy.There is no matter between earth and sun ie vacuum hence, the only possible way sun's heat and light can reach the earth is through radiation
Question 5
1 / -0

Heat is not transferred by the process of convection in:

A
solid

B
liquid

C
gas

D
none of the above

Solution

Convective heat transfer occurs within a fluid itself and it is carried out by transfer of one fraction of the fluid to the remaining portion. Hence unlike conduction, transfer of molecules occurs during convection. Since movement of particles constitutes convection, it is the macro form of heat transfer. Also convection is only possible in fluids where the particles can moved easily and the rate of convective heat transfer depends on the rate of flow to a great extend. In solids the particles are rigid and cannot move, so heat is not transferred by the process of convection in solids.
Question 6
1 / -0

The fastest mode of transfer of heat is

A
conduction

B
convection

C
radiation

D
all the above three

Solution

The energy transferred by radiation propagates with the speed of light . In radiation , heat is transferred by electromagnetic waves , which have the fastest speed , so it is the fastest mode of heat transmission .
Question 7
1 / -0

Heat transfer is done by:

A
convection

B
cooling

C
expansion

D
none of the above

Solution

Convection is one of the methods of heat transfer. In this method, heat is transferred in fluid from one part to another part by the means of movement of the molecules of the fluid.
Question 8
1 / -0

Radiation depends on:

A
the temperature of the substance

B
the colour of the substance

C
both the above

D
none of these

Solution

Radiation depends upon temperature of the substance as well as colour of the substance. More the temperature, more the radiation of heat And as it is known that black body is good emitter as well as good absorber, radiation depends on colour.
Question 9
1 / -0

In convection, heat is transferred

A
Upwards

B
Downwards

C
Sideways

D
In all directions

Solution

Convective heat transfer occurs within a fluid itself and it is carried out by transfer of one fraction of the fluid to the remaining portion. The transfer of molecules occurs during convection. Since the movement of particles constitutes convection, it is the macro form of heat transfer. Also, convection is only possible in fluids where the particles can move easily and the rate of convective heat transfer depends on the rate of flow to a great extend.
Question 10
1 / -0

In vacuum, heat is transferred by

A
conduction

B
convection

C
radiation

D
all the above three

Solution

In a vacuum, heat is transferred by radiation. In radiation, heat is transferred in the form of electromagnetic waves, which require no medium to propagate .
In conduction , heat is transferred from particle to particle , in vacuum there are no particles to transfer the heat , so conduction cannot transfer heat in vacuum .
In convection, heat is transferred by the actual movement of particles , but vacuum has no particles , so convection cannot work in vacuum .

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Re-Attempt Weekly Quiz Competition

Thermal Properties of Matter Test - 14

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Thermal Properties of Matter Test - 14

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Question 1

$$PV=RT$$

$$PV= 2RT$$

$$PV$$ = $$\displaystyle\ \frac{1}{2} RT$$

$$PV = 4RT$$

Solution

Question 2

colourless molecules

covalent bonding of molecules

attraction of molecules

absolute scale of temperature

Solution

Question 3

$$P - V$$ graph

$$P - \displaystyle{\frac{1}{V}}$$ graph

$$P - T$$ graph

$$V - T$$ graph

Solution

Question 4

radiation

conduction

convection

all of these

Solution

Question 5

solid

liquid

gas

none of the above

Solution

Question 6

conduction

convection

radiation

all the above three

Solution

Question 7

convection

cooling

expansion

none of the above

Solution

Question 8

the temperature of the substance

the colour of the substance

both the above

none of these

Solution

Question 9

Upwards

Downwards

Sideways

In all directions

Solution

Question 10

conduction

convection

radiation

all the above three

Solution

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