Q. What is the effect of adding a solute to a solvent on the boiling point of the solution?
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A.
Boiling point decreases
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B.
Boiling point remains the same
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C.
Boiling point increases
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D.
Boiling point becomes unpredictable
Solution
Adding a solute to a solvent increases the boiling point of the solution, a phenomenon known as boiling point elevation.
Correct Answer: C — Boiling point increases
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Q. What is the effect of increasing pressure on the boiling point of a liquid?
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A.
Boiling point decreases
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B.
Boiling point increases
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C.
No effect
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D.
Boiling point becomes constant
Solution
Increasing pressure raises the boiling point of a liquid.
Correct Answer: B — Boiling point increases
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Q. What is the effect of increasing temperature on the density of liquids?
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A.
Density increases
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B.
Density decreases
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C.
Density remains constant
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D.
Density fluctuates randomly
Solution
Generally, the density of liquids decreases with an increase in temperature.
Correct Answer: B — Density decreases
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Q. What is the effect of increasing temperature on the kinetic energy of gas molecules?
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A.
Increases kinetic energy
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B.
Decreases kinetic energy
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C.
No effect
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D.
Depends on the gas
Solution
Increasing temperature increases the kinetic energy of gas molecules.
Correct Answer: A — Increases kinetic energy
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Q. What is the effect of increasing temperature on the kinetic energy of gas particles?
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A.
It decreases kinetic energy.
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B.
It has no effect.
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C.
It increases kinetic energy.
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D.
It causes phase change.
Solution
Increasing temperature increases the kinetic energy of gas particles.
Correct Answer: C — It increases kinetic energy.
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Q. What is the effect of increasing temperature on the kinetic energy of particles in a substance?
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A.
Kinetic energy decreases
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B.
Kinetic energy remains constant
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C.
Kinetic energy increases
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D.
Kinetic energy fluctuates
Solution
Increasing temperature increases the kinetic energy of particles in a substance.
Correct Answer: C — Kinetic energy increases
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Q. What is the effect of increasing temperature on the pressure of a gas at constant volume?
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A.
Pressure decreases
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B.
Pressure remains constant
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C.
Pressure increases
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D.
Pressure fluctuates
Solution
According to Gay-Lussac's law, pressure increases with temperature at constant volume.
Correct Answer: C — Pressure increases
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Q. What is the effect of increasing temperature on the vapor pressure of a liquid?
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A.
It decreases
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B.
It remains constant
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C.
It increases
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D.
It fluctuates
Solution
Increasing temperature increases the kinetic energy of the molecules, leading to an increase in vapor pressure.
Correct Answer: C — It increases
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Q. What is the effect of increasing temperature on the viscosity of a liquid?
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A.
Increases viscosity
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B.
Decreases viscosity
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C.
No effect
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D.
Depends on the liquid
Solution
Increasing temperature generally decreases the viscosity of a liquid.
Correct Answer: B — Decreases viscosity
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Q. What is the main reason that gases have low density compared to solids and liquids?
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A.
High temperature
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B.
Low pressure
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C.
Large particle separation
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D.
High kinetic energy
Solution
Gases have low density because their particles are far apart, leading to a larger volume for the same mass.
Correct Answer: C — Large particle separation
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Q. What is the molar volume of an ideal gas at standard temperature and pressure (STP)?
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A.
22.4 L
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B.
24.5 L
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C.
18.0 L
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D.
30.0 L
Solution
The molar volume of an ideal gas at STP is 22.4 L.
Correct Answer: A — 22.4 L
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Q. What is the molar volume of an ideal gas at STP (Standard Temperature and Pressure)?
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A.
22.4 L
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B.
24.5 L
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C.
18.0 L
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D.
30.0 L
Solution
The molar volume of an ideal gas at STP is 22.4 L.
Correct Answer: A — 22.4 L
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Q. What is the molar volume of an ideal gas at STP?
-
A.
22.4 L
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B.
24.5 L
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C.
18.0 L
-
D.
30.0 L
Solution
The molar volume of an ideal gas at standard temperature and pressure (STP) is 22.4 L.
Correct Answer: A — 22.4 L
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Q. What is the phenomenon called when a liquid changes to gas at a temperature below its boiling point?
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A.
Evaporation
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B.
Condensation
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C.
Sublimation
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D.
Freezing
Solution
Evaporation is the process where a liquid changes to gas at temperatures below its boiling point.
Correct Answer: A — Evaporation
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Q. What is the phenomenon called when a liquid changes to gas at temperatures below its boiling point?
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A.
Evaporation
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B.
Condensation
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C.
Sublimation
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D.
Vaporization
Solution
Evaporation is the process where a liquid changes to gas at temperatures below its boiling point.
Correct Answer: A — Evaporation
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Q. What is the phenomenon called when a liquid rises in a narrow tube against gravity?
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A.
Capillarity
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B.
Viscosity
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C.
Surface tension
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D.
Hydrostatic pressure
Solution
Capillarity is the phenomenon where a liquid rises in a narrow tube against gravity due to adhesive and cohesive forces.
Correct Answer: A — Capillarity
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Q. What is the primary characteristic of liquids that distinguishes them from solids?
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A.
Definite shape
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B.
Definite volume
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C.
Incompressibility
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D.
Fluidity
Solution
Liquids have fluidity, allowing them to flow and take the shape of their container.
Correct Answer: D — Fluidity
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Q. What is the primary factor that affects the state of matter of a substance?
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A.
Temperature
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B.
Color
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C.
Mass
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D.
Volume
Solution
Temperature is the primary factor that affects the state of matter by influencing kinetic energy.
Correct Answer: A — Temperature
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Q. What is the primary intermolecular force present in gases?
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A.
Hydrogen bonding
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B.
Dipole-dipole interactions
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C.
London dispersion forces
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D.
Ionic bonding
Solution
London dispersion forces are the primary intermolecular forces in gases, as they are weak and allow for greater movement.
Correct Answer: C — London dispersion forces
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Q. What is the primary intermolecular force present in liquid water?
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A.
Ionic bonds
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B.
Covalent bonds
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C.
Hydrogen bonds
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D.
Van der Waals forces
Solution
Water molecules are held together primarily by hydrogen bonds.
Correct Answer: C — Hydrogen bonds
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Q. What is the primary intermolecular force present in liquids?
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A.
Ionic bonds
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B.
Covalent bonds
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C.
Dispersion forces
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D.
Dipole-dipole interactions
Solution
Liquids primarily exhibit dipole-dipole interactions due to the presence of polar molecules.
Correct Answer: D — Dipole-dipole interactions
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Q. What is the primary intermolecular force present in water?
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A.
Ionic bonds
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B.
Covalent bonds
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C.
Hydrogen bonds
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D.
Van der Waals forces
Solution
Water exhibits hydrogen bonding due to the presence of O-H bonds.
Correct Answer: C — Hydrogen bonds
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Q. What is the primary reason for the compressibility of gases?
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A.
High density
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B.
Low temperature
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C.
Large intermolecular spaces
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D.
Strong intermolecular forces
Solution
Gases are highly compressible due to large intermolecular spaces between particles.
Correct Answer: C — Large intermolecular spaces
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Q. What is the primary reason for the high boiling point of water compared to other similar-sized molecules?
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A.
Hydrogen bonding
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B.
Van der Waals forces
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C.
Ionic bonding
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D.
Covalent bonding
Solution
The high boiling point of water is primarily due to hydrogen bonding between water molecules.
Correct Answer: A — Hydrogen bonding
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Q. What is the primary reason gases can be compressed much more than liquids or solids?
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A.
High density
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B.
Low density
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C.
Large intermolecular spaces
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D.
Strong intermolecular forces
Solution
Gases can be compressed due to large intermolecular spaces between particles, unlike liquids and solids.
Correct Answer: C — Large intermolecular spaces
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Q. What is the process called when a solid changes directly into a gas?
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A.
Sublimation
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B.
Evaporation
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C.
Condensation
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D.
Deposition
Solution
Sublimation is the process where a solid changes directly into a gas without passing through the liquid state.
Correct Answer: A — Sublimation
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Q. What is the relationship between pressure and temperature for a fixed amount of gas at constant volume?
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A.
Directly proportional
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B.
Inversely proportional
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C.
No relationship
-
D.
Exponential
Solution
Pressure and temperature are directly proportional for a fixed amount of gas at constant volume, as described by Gay-Lussac's law.
Correct Answer: A — Directly proportional
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Q. What is the relationship between pressure and temperature in Gay-Lussac's Law?
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A.
Directly proportional
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B.
Inversely proportional
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C.
No relationship
-
D.
Exponential relationship
Solution
Gay-Lussac's Law states that pressure is directly proportional to temperature when volume is constant.
Correct Answer: A — Directly proportional
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Q. What is the relationship between the density of a gas and its molar mass at constant temperature and pressure?
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A.
Density is directly proportional to molar mass
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B.
Density is inversely proportional to molar mass
-
C.
Density is independent of molar mass
-
D.
Density is equal to molar mass
Solution
At constant temperature and pressure, density is directly proportional to molar mass according to the ideal gas law.
Correct Answer: A — Density is directly proportional to molar mass
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Q. What is the term for the change of state from gas to liquid?
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A.
Sublimation
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B.
Condensation
-
C.
Evaporation
-
D.
Freezing
Solution
Condensation is the process where gas turns into liquid as it loses energy.
Correct Answer: B — Condensation
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