Thermal Properties of Matter Test

Result

Thermal Properties of Matter Test - 12

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Two containers of equal volume containing the same gas at pressure $$P_{1}$$ and $$P_{2}$$ and absolute temperature $$T_{1}$$ and $$T_{2}$$ respectively were connected with narrow capillary tube. The gas reaches a common pressure P and a common temperature T. The ratio P/T is equal to :

A
$$\dfrac{P_{1}}{T_{1}} +\dfrac{P_{2}}{T_{2}}$$

B
$$\dfrac{1}{2}\left ( \dfrac{P_{1}}{T_{1}} +\dfrac{P_{2}}{T_{2}}\right )$$

C
$$\dfrac{P_{1}T_{2}+P_{2}T_{1}}{T_{1}+T_{2}}$$

D
$$\dfrac{P_{1}T_{2}-P_{2}T_{1}}{T_{1}-T_{2}}$$

Solution

Since the mass remains constant before and after opening the tube, moles of the gases remain same.
Thus $$\dfrac{P_1V}{RT_1}+\dfrac{P_2V}{RT_2}=\dfrac{P(2V)}{RT}$$
$$\implies \dfrac{P}{T}=\dfrac{1}{2}(\dfrac{P_1}{T_1}+\dfrac{P_2}{T_2})$$
Question 2
1 / -0

Which of the following methods of flow of heat is (are) based on gravitational attraction?

A
Conduction

B
Convection

C
Radiation

D
All of these

Solution

Convectional currents that are set up in vessels having considerable height, work on the principle that cooler, denser water tries to move downwards on account of its larger weight while the water closer to the heater i.e. the water at lower height gets heated up and tries to move upwards on account of lower weight.
Question 3
1 / -0

In a room containing air, heat can go from one place to another by :

A
conduction

B
convection

C
radiation

D
all of these

Solution

Heat can travel by conduction as material medium is available as wall.
Heat can travel by convection as material medium is available as air.
Heat can travel by radiation as no material medium is needed.
Question 4
1 / -0

Ventilators are provided at the top of a room:

A
To bring oxygen for breathing.

B
So that sunlight may enter the room.

C
To maintain convectional currents to keep the air fresh in the room.

D
To provide an outlet for carbon dioxide.

Solution

Hotter air has lower density in compare to cold air. The air we exhale is relatively hotter than the air present in the room so that hotter air moves upwards and normal air in the room seat downward. this process happens continuously, and at the top level in the room, hot air gets collected. To exhaust that air from the room we provide ventilators at the top. Ventilators also help to inter fresh air inside the room. The process of flow of air is known as conventional current.
Hence Option C
Question 5
1 / -0

Sun's heat reaches the earth by the process of:

A
Conduction

B
Convection

C
Radiation

D
Scattering

Solution

Sun's heat reaches the earth by the process of radiation.
Question 6
1 / -0

A) Heat transfer by conduction and convection require a material medium.
B) Heat transfer by radiation doesn't require a material medium.

A
both A and B are true

B
A is true but B is false

C
B is true but A is false

D
both A and B are false

Solution

Conduction and convection are processes where heat is transferred by the collision of molecules. Hence, for these processes to take place, we need a material medium.
In radiation, heat travels as electromagnetic waves which do not require a medium to travel. Its transfer mechanism is completely independent of the medium.
Question 7
1 / -0

In the following, which statement is correct :
a) A hot body emits hot radiations only.
b) A cold body absorbs the radiations only.
c) A cold body emits cold radiations only.
d) All the bodies emit and absorb radiations simultaneously.

A
a

B
b

C
c

D
d

Solution

Since, we know that, Above zero kelvin, all the bodies emit and absorb radiations simultaneously.
Therefore, "All the bodies emit and absorb radiations simultaneously" is the correct statement.
Question 8
1 / -0

Newton's law of cooling is applied in laboratory for the determination of the

A
Specific heat of gases

B
Latent heat of gases

C
Specific heat of liquids

D
Latent heat of liquids

Solution

When a body with mass 'm' and specific heat 's' cools, the rate of loss of heat is given by $$\dfrac{dQ}{dt}$$ = $$-ms$$$$\dfrac{d\theta}{dt}$$
where, $$\theta$$ is the temperature of the body
$$t$$ is time
Question 9
1 / -0

Radiation is passing through a transparent medium, then :

A
the temperature of medium increases

B
the temperature of medium decreases

C
the temperature of medium does not alter

D
the temperature of medium first increases and then becomes steady

Solution

Opacity affects radiation; Transparency which is essentially lacks opacity actually allows radiation through it.
Hence, the temperature doesn't alter.
Question 10
1 / -0

When the pressure of a gas is changed, then:

A
The density of the gas also changes.

B
The ratio of the pressure to the density remains unaffected.

C
The velocity of the sound remains unaffected.

D
The value of $$\gamma$$ changes.

Solution

When the pressure of a gas is changed, then the ratio of the pressure to the density remains unaffected as $$\displaystyle = \frac{P}{\rho} = \frac{RT}{M}$$

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Thermal Properties of Matter Test - 12

Result

Thermal Properties of Matter Test - 12

Score

-

Rank

-

SHARING IS CARING

Question 1

$$\dfrac{P_{1}}{T_{1}} +\dfrac{P_{2}}{T_{2}}$$

$$\dfrac{1}{2}\left ( \dfrac{P_{1}}{T_{1}} +\dfrac{P_{2}}{T_{2}}\right )$$

$$\dfrac{P_{1}T_{2}+P_{2}T_{1}}{T_{1}+T_{2}}$$

$$\dfrac{P_{1}T_{2}-P_{2}T_{1}}{T_{1}-T_{2}}$$

Solution

Question 2

Conduction

Convection

Radiation

All of these

Solution

Question 3

conduction

convection

radiation

all of these

Solution

Question 4

To bring oxygen for breathing.

So that sunlight may enter the room.

To maintain convectional currents to keep the air fresh in the room.

To provide an outlet for carbon dioxide.

Solution

Question 5

Conduction

Convection

Radiation

Scattering

Solution

Question 6

both A and B are true

A is true but B is false

B is true but A is false

both A and B are false

Solution

Question 7

a

b

c

d

Solution

Question 8

Specific heat of gases

Latent heat of gases

Specific heat of liquids

Latent heat of liquids

Solution

Question 9

the temperature of medium increases

the temperature of medium decreases

the temperature of medium does not alter

the temperature of medium first increases and then becomes steady

Solution

Question 10

The density of the gas also changes.

The ratio of the pressure to the density remains unaffected.

The velocity of the sound remains unaffected.

The value of $$\gamma$$ changes.

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.