States of Matter Test

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States of Matter Test - 7

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Weekly Quiz Competition

Question 1
1 / -0

As the temperature increases, average kinetic energy of molecules increases. What would be the effect of increase of temperature on pressure provided the volume is constant?

A
decreases

B
increases

C
becomes half

D
remains same

Solution

P α T at constant volume.This is according to Gay Lussac’s law-“ At constant volume, the pressure of a given mass of a gas is directly proportional to its absolute temperature.”
Question 2
1 / -0

Gases possess characteristic critical temperature which depends upon the magnitude of intermolecular forces between the particles. Following are the critical temperatures of some gases. From the data what would be the order of liquefaction of these gases? Start writing the order from the gas liquefying first.

Gases H₂ He O₂ N₂

Critical temperature in Kelvin 33.2 5.3 154.3 126

A
H₂, He, O₂, N₂

B
O₂, N₂, H₂, He

C
N₂, O₂, He, H₂

D
He, O₂, H₂, N₂

Solution

T_c= 8a/27Rb. As T_c increases ‘a’ increases means force of attraction between molecules also increase hence liquification increases.
In orther words, more the critical temperature more will be the ease of liquification.
Question 3
1 / -0

Domestic power supply in India is

A
416V , 60Hz

B
220V, 50Hz

C
110V, 60 Hz

D
24V DC

Solution

Domestic power supply in India is 220V voltage and 50Hz frequency.
Question 4
1 / -0

Atmospheric pressures recorded in different cities are as follows: Consider the above data and mark the place at which liquid will boil first.

Cities Shimla Bangalore Delhi Mumbai

p in N/M² 1.01 × 10⁵ 1.2 × 10⁵ 1.02 × 10⁵ 1.21 × 10⁵

A
Delhi

B
Shimla

C
Mumbai

D
Bangalore

Solution

Boiling point of the given liquid decreases with decrease in the atmospheric pressure.
Question 5
1 / -0

Increase in kinetic energy can overcome intermolecular forces of attraction. How will the viscosity of liquid be affected by the increase in temperature?

A
Decrease

B
Increase

C
No effect

D
No regular pattern will be followed

Solution

viscosity is inversely proportional to the temperature. As the temperature increase, viscosity decreases.
Question 6
1 / -0

How does the surface tension of a liquid vary with increase in temperature?

A
No regular pattern is followed

B
Decreases

C
Increases

D
Remains same

Solution

As temperature increases surface tension decreases beacuse the cohesive forces decreases with increase of molecular thermal activity.
Question 7
1 / -0

With regard to the gaseous state of matter which of the following statements is correct?

A
Complete disorder of molecules and Random motion of molecules

B
Fixed position of molecules and complete order of molecules.

C
Random motion of molecules and fixed position of molecules.

D
Complete order of molecules and fixed position of molecules

Solution

The extent of disorder or randomness among three sate of matter is gases > liquid > solids.

Gases	H₂	He	O₂	N₂
Critical temperature in Kelvin	33.2	5.3	154.3	126

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Cities	Shimla	Bangalore	Delhi	Mumbai
p in N/M²	1.01 × 10⁵	1.2 × 10⁵	1.02 × 10⁵	1.21 × 10⁵

States of Matter Test - 7

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States of Matter Test - 7

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Question 1

decreases

increases

becomes half

remains same

Solution

Question 2

H2, He, O2, N2

O2, N2, H2, He

N2, O2, He, H2

He, O2, H2, N2

Solution

Question 3

416V , 60Hz

220V, 50Hz

110V, 60 Hz

24V DC

Solution

Question 4

Delhi

Shimla

Mumbai

Bangalore

Solution

Question 5

Decrease

Increase

No effect

No regular pattern will be followed

Solution

Question 6

No regular pattern is followed

Decreases

Increases

Remains same

Solution

Question 7

Complete disorder of molecules and Random motion of molecules

Fixed position of molecules and complete order of molecules.

Random motion of molecules and fixed position of molecules.

Complete order of molecules and fixed position of molecules

Solution

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H₂, He, O₂, N₂

O₂, N₂, H₂, He

N₂, O₂, He, H₂

He, O₂, H₂, N₂