Study of Gas Law Test

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Study of Gas Law Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

Why does a gas have no definite shape and volume?

A
It is because gas molecules have high kinetic energy.

B
It is because gas molecules have random motion.

C
It is because gas molecules have negligible force of attraction.

D
It is because gas molecules vibrate along a mean position.
Question 2
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Which of the following is in accordance with Boyle's law for a given mass of dry gas at constant temperature?

A
If the pressure is halved, the volume is reduced to one-third of the original.

B
If the pressure is tripled, the volume is reduced to one-third of the original.

C
If the pressure is doubled, the volume is reduced to one-fourth of the original.

D
If the pressure is reduced to one-third, the volume is doubled.
Question 3
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What is the effect of heating on pressure of gas in a container?

A
It increases.

B
It decreases.

C
It remains constant.

D
It depends on the type of gas.
Question 4
1 / -0

Large volume of compressed natural gas (CNG) can be put into small cylinders and transported. What makes this possible?

A
High compressibility of gases

B
Low compressibility of gases

C
High kinetic energy of gas molecules

D
High density of gases
Question 5
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Two cylinders containing carbon dioxide are connected together by a tube fitted with a tap. The capacity of one cylinder is 3 dm³ and that of the other cylinder is 2 dm³; the pressure of the first cylinder is 550 mm Hg and that of the second cylinder is 800 mm Hg. What will be the final pressure in the cylinders on opening the tap? (Temperature remains constant.)

A
330 mm Hg

B
320 mm Hg

C
650 mm Hg

D
450 mm Hg
Question 6
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Which of the following represents Boyle's law?

A

B

C

D
Question 7
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A gas occupies 800 cm³ under a pressure of 760 mm Hg. Under what pressure will the volume of the gas be reduced by 20% of its original volume? (Temperature remains constant.)

A
3800 mm Hg

B
950 mm Hg

C
980 mm Hg

D
1900 mm Hg
Question 8
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What is true about gases according to kinetic theory?

A
They have high density and compressibility.

B
They have low density and compressibility.

C
They have high density and low compressibility.

D
They have low density and high compressibility.
Question 9
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According to kinetic theory, what is true about collision between gas molecules and with the container, respectively?

A
They are perfectly inelastic; and impart momentum to container wall.

B
They are perfectly elastic; and impart momentum to container wall.

C
They are perfectly inelastic; and do not impart momentum to container wall.

D
They are perfectly elastic, and do not impart momentum to container wall.
Question 10
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According to Boyle's law, which of the following relations is true?

A

B

C

D
Question 11
1 / -0

Which property of gas is responsible for spreading scent of a perfume throughout the entire space?

A
High compressibility

B
High diffusibility

C
Low density

D
High pressure
Question 12
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Which of the following changes occurs when a constant volume of gas is heated?

A
Pressure decreases and average kinetic energy increases.

B
Pressure increases and average kinetic energy decreases.

C
Pressure and average kinetic energy both increase.

D
Pressure and average kinetic energy both decrease.
Question 13
1 / -0

What is the value of 27°C in Kelvin scale?

A
300 K

B
246 K

C
273 K

D
373 K
Question 14
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At what temperature will the volume of a gas at 0°C be tripled? (Pressure remains constant.)

A
546°C

B
819°C

C
273°C

D
1082°C
Question 15
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Which of the following is true according to kinetic theory?

A
Gases have definite volume.

B
Gases have indefinite expansibility.

C
Gases have definite shape.

D
Gases have indefinite density.
Question 16
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Which of the following has high diffusion rate?

A
Methane

B
Blood

C
Honey

D
Cheese
Question 17
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What is the relation between Celsius (°C) and Kelvin scales (K)?

A
K = C + 273

B
K = C – 273

C
C = K + 273

D
C = K 273
Question 18
1 / -0

On which of the following factors does the speed of gas molecules depend?

A
Mass and volume of gas molecules

B
Mass and temperature of gas molecules

C
Density and volume of gas molecules

D
Pressure and temperature of gas molecules
Question 19
1 / -0

Which of the following explains the reason for bursting of balloon, when kept in bright sun?

A
Boyle`s law

B
Charles`s law

C
Diffusion

D
Kinetic theory