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 is least compressible?

  1. Solid

  2. Liquid

  3. Gas
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Solids are least compressible because the particles are held together by strong intermolecular forces.

Multiple choice

Which state of matter has the lowest specific heat capacity?

  1. Solid

  2. Liquid

  3. Gas
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Gases have the lowest specific heat capacity because the particles are not held together by strong intermolecular forces and require less energy to raise their temperature.

Multiple choice

Which state of matter is most likely to undergo a phase change?

  1. Solid

  2. Liquid

  3. Gas
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Liquids are most likely to undergo a phase change because they are at an intermediate state between solids and gases and can easily change from one state to another.

Multiple choice

Which state of matter is least likely to undergo a phase change?

  1. Solid

  2. Liquid

  3. Gas
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Solids are least likely to undergo a phase change because the particles are held together by strong intermolecular forces and require more energy to change from one state to another.

Multiple choice

Which of the following materials is commonly used as a phase change material (PCM) for latent heat storage?

  1. Water

  2. Ice

  3. Salt

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

Paraffin wax is a widely used PCM due to its high latent heat of fusion, suitable melting temperature range, and chemical stability.

Multiple choice

During the charging process of a latent heat storage system, what happens to the PCM?

  1. It melts and absorbs heat

  2. It solidifies and releases heat

  3. It remains in the same phase

  4. It undergoes a chemical reaction
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

During charging, the PCM melts by absorbing heat from the surrounding environment or a heat source.

Multiple choice

What is the name of the process by which water vapor in the atmosphere condenses into liquid water?

  1. Condensation

  2. Evaporation

  3. Sublimation

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

Condensation is the process by which water vapor in the atmosphere condenses into liquid water.

Multiple choice

Which fluid property is responsible for the formation of surface waves?

  1. Density

  2. Viscosity

  3. Surface tension

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

Surface tension is the property of a fluid that causes its surface to behave like a stretched elastic membrane. It is responsible for the formation of surface waves, as it resists the deformation of the fluid's surface.

Multiple choice

Which fluid property is responsible for the ability of a fluid to flow?

  1. Density

  2. Viscosity

  3. Surface tension

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

Fluidity is the property of a fluid that allows it to flow and deform easily. It is the opposite of viscosity.

Multiple choice

Which of the following is a type of diffusion?

  1. Molecular diffusion

  2. Eddy diffusion

  3. Both a and b

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Molecular diffusion and eddy diffusion are both types of diffusion.

Multiple choice

What is the typical viscosity of warm dense matter?

  1. High

  2. Low

  3. Zero

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Warm dense matter typically has a high viscosity, meaning that it is resistant to flow.

Multiple choice

Which of the following is NOT a characteristic of a safer solvent?

  1. Low toxicity

  2. High boiling point

  3. Non-flammable

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

A high boiling point is not a characteristic of a safer solvent because it can lead to increased energy consumption and emissions during the manufacturing process.

Multiple choice

Which of the following is an example of a solvent that is both safe and sustainable?

  1. Water

  2. Methanol

  3. Acetone

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

Water is a safe and sustainable solvent because it is non-toxic, renewable, and has a low environmental impact.

Multiple choice

Which of the following is an example of a solvent that is both safe and effective for use in pharmaceutical manufacturing?

  1. Dichloromethane

  2. Ethanol

  3. Benzene

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

Ethanol is a safe and effective solvent for use in pharmaceutical manufacturing because it is less toxic, less flammable, and more biodegradable than the other options.

Multiple choice

Which of the following is an example of a solvent that is both safe and renewable?

  1. Water

  2. Methanol

  3. Acetone

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

Water is a safe and renewable solvent because it is non-toxic, renewable, and has a low environmental impact.