Chemistry ยท Science General

States of Matter

2,682 Questions

States of matter questions explore physical changes, evaporation, phase transitions, and the properties of liquids and gases. Topics cover density, cryosurgery, heavy water, and electrolytes. This foundational chemistry topic frequently appears in general science sections of SSC and railway exams.

Phase change mechanismsEvaporation and temperature effectsProperties of liquidsPhysical versus chemical changesElectrolytes and heavy water

States of Matter Questions

Multiple choice

Which state of matter has the highest density?

  1. Solid

  2. Liquid

  3. Gas

  4. Plasma
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Solids have the highest density because their particles are closely packed together, resulting in a higher mass per unit volume.

Multiple choice

What is the term for the change of state from gas to liquid?

  1. Melting

  2. Freezing

  3. Vaporization

  4. Condensation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Condensation is the process by which a gas changes to a liquid state upon releasing heat.

Multiple choice

Which state of matter has the lowest viscosity?

  1. Solid

  2. Liquid

  3. Gas

  4. Plasma
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Gases have the lowest viscosity because their particles move freely and independently, encountering minimal resistance to flow.

Multiple choice

What is the term for the change of state from liquid to solid?

  1. Melting

  2. Freezing

  3. Vaporization

  4. Condensation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Freezing is the process by which a liquid substance changes to a solid state upon releasing heat.

Multiple choice

What is the term for the change of state from plasma to gas?

  1. Melting

  2. Freezing

  3. Vaporization

  4. Recombination
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Recombination is the process by which a plasma changes to a gas state upon losing energy and allowing electrons to recombine with ions.

Multiple choice

What is the term for the change of state from solid to gas without passing through the liquid state?

  1. Melting

  2. Freezing

  3. Sublimation

  4. Condensation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sublimation is the process by which a solid substance changes directly to a gas state upon absorbing heat.

Multiple choice

Which state of matter has the highest compressibility?

  1. Solid

  2. Liquid

  3. Gas

  4. Plasma
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Gases have the highest compressibility because their particles are loosely packed and can be easily compressed by applying pressure.

Multiple choice

What is the term for the change of state from plasma to solid?

  1. Melting

  2. Freezing

  3. Deposition

  4. Condensation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Deposition is the process by which a plasma changes directly to a solid state upon losing energy and allowing ions to condense into a solid structure.

Multiple choice

Which of the following is a physical change involving a change in the state of matter?

  1. Melting

  2. Dissolving

  3. Rusting

  4. Burning
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Melting is a physical change where a solid substance transforms into a liquid state upon the absorption of heat.

Multiple choice

What term describes the energy required to change a solid substance into a liquid at its melting point?

  1. Latent Heat of Fusion

  2. Latent Heat of Vaporization

  3. Specific Heat Capacity

  4. Enthalpy of Reaction
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Latent Heat of Fusion is the energy required to overcome intermolecular forces and transform a solid into a liquid at its melting point.

Multiple choice

Which of the following is an example of a substance that sublimates?

  1. Water

  2. Carbon Dioxide

  3. Sodium Chloride

  4. Iron
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carbon Dioxide is a substance that undergoes sublimation, directly transitioning from a solid to a gas without passing through the liquid phase.

Multiple choice

What is the term for the process in which a gas condenses into a liquid?

  1. Deposition

  2. Sublimation

  3. Evaporation

  4. Condensation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Condensation is the process where a gas transforms into a liquid, releasing heat and decreasing in volume.

Multiple choice

Which of the following statements is true regarding the boiling point of a liquid?

  1. It is dependent on pressure.

  2. It is independent of pressure.

  3. It increases with increasing pressure.

  4. It decreases with increasing pressure.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The boiling point of a liquid is dependent on pressure. As pressure increases, the boiling point also increases.

Multiple choice

What is the term for the energy required to transform a liquid into a gas at its boiling point?

  1. Latent Heat of Fusion

  2. Latent Heat of Vaporization

  3. Specific Heat Capacity

  4. Enthalpy of Reaction
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Latent Heat of Vaporization is the energy required to overcome intermolecular forces and transform a liquid into a gas at its boiling point.

Multiple choice

Which of the following is an example of a substance that undergoes deposition?

  1. Water

  2. Carbon Dioxide

  3. Sodium Chloride

  4. Iron
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Water is a substance that undergoes deposition, directly transitioning from a gas to a solid without passing through the liquid phase.