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WorksheetsSCIENCE 10-Gases
Total questions: 40
Worksheet time: 20mins
Which of the following describes gases correctly?
They have fixed volume and shape
They take the shape of their container and are highly compressible
They are incompressible and have high density
They have strong intermolecular forces
Why do gases have lower densities compared to solids and liquids?
They have strong intermolecular forces
Their particles are packed closely together
They contain large empty spaces between molecules
They have fixed shapes
What happens to the volume of gas when more pressure is applied?
It increases
It decreases
It remains the same
It expands indefinitely
Which of the following is an example of a gas at room temperature?
Ice
Water vapor
Mercury
Salt
What property of gases allows them to completely mix in a container?
High density
High intermolecular forces
Random motion of particles
Fixed shape
According to the Kinetic Molecular Theory, gas particles:
Are in constant random motion
Have strong attraction between molecules
Move in an organized pattern
Are stationary
Which scientist(s) developed the Kinetic Molecular Theory of gases?
Isaac Newton
Ludwig Boltzmann and James Clerk Maxwell
Albert Einstein
Dmitri Mendeleev
Which of the following is NOT a postulate of the Kinetic Molecular Theory?
Gas particles move in random motion
Gas particles have negligible volume
Gas particles exert strong attractive forces
Collisions between gas particles are elastic
What happens to the kinetic energy of gas molecules when the temperature increases?
It decreases
It remains constant
It increases
It depends on the volume of the gas
The kinetic energy of gas molecules is directly related to:
Volume
Pressure
Temperature
Mass
Which of the following is NOT a physical quantity of gases?
Pressure
Volume
Temperature
Density
What is the unit of gas pressure commonly used in chemistry?
Kelvin (K)
Atmosphere (atm)
Liter (L)
Gram per cubic centimeter (g/cm³)
The three-dimensional space occupied by a gas is called:
Density
Volume
Temperature
Pressure
The unit Kelvin (K) is used to measure:
Temperature
Volume
Pressure
Force
What happens to the gas molecules in a balloon when it is placed in a hotter environment?
The gas molecules slow down
The gas molecules move faster and expand the balloon
The gas molecules stop moving
The balloon shrinks
What happens when a gas is compressed?
The particles move farther apart
The volume decreases
The pressure decreases
The mass increases
If the kinetic energy of gas particles is increased, what happens to gas pressure inside a container?
It decreases
It remains constant
It increases
It becomes zero
Why do gas particles collide with the walls of their container?
They are at rest
They are in constant random motion
They have no kinetic energy
They are attracted to the walls
Why do gases expand to fill their container?
Gas molecules attract each other strongly
Gas molecules have fixed volume
Gas molecules move freely and in random motion
Gas molecules are heavier than liquids
A basketball left outside overnight shrinks because of:
The increase in pressure
The decrease in temperature, which slows gas movement
The attraction between gas molecules
The gas escaping into the air
What is the shape and volume of a gas?
Definite shape, definite volume
Indefinite shape, definite volume
indefinite shape, indefinite volume
definite shape, indefinite volume
Which of the following best explains why gases are easily compressed?
gas particles are tightly packed together
gas particles are far apart from one another
gas particles do not move
gas particles attract each other strongly
What happens to the movement of gas particles when the temperature increases?
they stop moving
they move slower
they move faster
they become solid
Which statement about gases is false?
Gases have low densities compared to solids and liquids.
Gases take the shape of their container.
Gas particles are arranged in a fixed, compact structure.
gases expand when pressure is applied.
What is the primary reason gas particles move freely?
They have strong intermolecular forces
They have weak intermolecular forces
They are heavier than liquids and solids
They do not possess kinetic energy
Which scientist contributed to the understanding of gas behavior through kinetic energy?
Charles Darwin
James Clerk Maxwell
Albert Einstein
Antoine Lavoisier
According to the Kinetic Molecular Theory, gas particles are always:
Fixed in position
Attracting one another
Moving in constant, random motion
Moving in a single direction
What happens when gas particles collide with each other or the walls of a container?
They stop moving
They lose energy
Their collisions are perfectly elastic
They form a solid
Which of the following is not a postulate of the Kinetic Molecular Theory?
Gas molecules are far apart compared to their size
Gas molecules exert strong attractive forces on one another
Gas particles move randomly and constantly
The kinetic energy of gas particles depends on temperature
What happens to gas particles when the temperature is reduced?
They move slower
They move faster
They expand
They become lighter
The unit mmHg stands for:
Millimeter of helium gas
Millimeter of hydrogen gas
Millimeter of mercury
Millimeter of hydrogen
If a gas has a pressure of 1 atm, what is its equivalent in mmHg?
101.325 mmHg
760 mmHg
500 mmHg
100 mmHg
A gas container holds 2.5 L of helium. What is its equivalent volume in milliliters (mL)?
250 mL
2500 mL
0.25 mL
25,000 mL
What is the temperature equivalent of 0°C in Kelvin (K)?
100 K
0 K
273 K
373 K
The amount of substance of a gas is measured in:
Joules
Moles
Kilograms
Liters
What happens to gas pressure if the volume is decreased while temperature remains
constant?
Pressure increases
Pressure decreases
Pressure remains the same
Pressure turns into kinetic energy
Which gas law states that volume is directly proportional to temperature?
Boyle's Law
Charles' Law
Avogadro's Law
Dalton's Law
A scientist cools a gas sample to -10°C. What is the equivalent temperature in Kelvin (K)?
273 K
263 K
283 K
0 K
The pressure of a gas is measured at 685 mmHg. What is its equivalent in atm?
0.90 atm
1.25 atm
1.00 atm
0.80 atm
A sample of oxygen gas contains 3.5 moles of molecules. How many molecules are present in the sample?
6.022 x 10^2^3
3.5 x 10^2^3
2.1 x 10^2^3
2.1 x 10^2^4
