Chemistry ยท Science General

States of Matter

2,382 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 of the following is NOT a type of phase transition?

  1. Solid-liquid

  2. Liquid-gas

  3. Solid-solid

  4. Gas-plasma
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gas-plasma is not a phase transition, but rather a change in the state of matter.

Multiple choice

At the critical point of a substance, which of the following is NOT true?

  1. The liquid and gas phases become indistinguishable.

  2. The density of the liquid and gas phases becomes equal.

  3. The pressure and temperature are at their maximum values.

  4. The specific heat capacity of the substance becomes infinite.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

At the critical point, the pressure and temperature are at their minimum values, not their maximum values.

Multiple choice

Which of the following is NOT a property that exhibits a discontinuity at a phase transition?

  1. Volume

  2. Enthalpy

  3. Entropy

  4. Specific heat capacity
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Specific heat capacity is a continuous function of temperature, even at phase transitions.

Multiple choice

Which of the following is NOT a characteristic of a second-order phase transition?

  1. Continuous change in volume

  2. Discontinuous change in entropy

  3. Infinite specific heat capacity

  4. Zero latent heat
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Second-order phase transitions are characterized by a continuous change in entropy, not a discontinuous change.

Multiple choice

Which of the following is NOT a type of phase diagram?

  1. Pressure-temperature phase diagram

  2. Temperature-composition phase diagram

  3. Pressure-composition phase diagram

  4. Entropy-temperature phase diagram
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Entropy-temperature phase diagrams are not commonly used.

Multiple choice

What is the process by which water changes from a liquid to a gas?

  1. Evaporation

  2. Condensation

  3. Precipitation

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

Evaporation is the process by which water changes from a liquid to a gas.

Multiple choice

What is the process by which water changes from a gas to a liquid?

  1. Evaporation

  2. Condensation

  3. Precipitation

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

Condensation is the process by which water changes from a gas to a liquid.

Multiple choice

What is the process by which a solid changes directly to a gas without passing through the liquid phase?

  1. Evaporation

  2. Condensation

  3. Precipitation

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

Sublimation is the process by which a solid changes directly to a gas without passing through the liquid phase.

Multiple choice

What is the process by which a gas changes directly to a solid without passing through the liquid phase?

  1. Deposition

  2. Condensation

  3. Precipitation

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

Deposition is the process by which a gas changes directly to a solid without passing through the liquid phase.

Multiple choice

What is the principle behind freeze drying?

  1. Rapid evaporation of water from a frozen product

  2. Sublimation of ice crystals directly from a frozen product

  3. Removal of moisture through a series of heating and cooling cycles

  4. Extraction of water using organic solvents
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Freeze drying involves the sublimation of ice crystals directly from a frozen product, bypassing the liquid phase.

Multiple choice

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

  1. Evaporation

  2. Condensation

  3. Precipitation

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

Condensation is the process by which water vapor in the atmosphere condenses into liquid water droplets, forming clouds and eventually leading to precipitation.

Multiple choice

What is the term used to describe the process by which water vapor in the atmosphere changes directly into ice crystals?

  1. Evaporation

  2. Condensation

  3. Precipitation

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

Sublimation is the process by which water vapor in the atmosphere changes directly into ice crystals, without first condensing into liquid water.

Multiple choice

What is the main component of acrylic paints?

  1. Oil

  2. Water

  3. Alcohol

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

Acrylic paints are composed primarily of acrylic resin, which provides them with their fast drying time and durability.

Multiple choice

What is the primary binder used in watercolor paints?

  1. Oil

  2. Water

  3. Alcohol

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

Watercolor paints utilize gum arabic as the primary binder, which gives them their water-soluble properties and transparency.

Multiple choice

What is the process by which water evaporates and condenses to form clouds?

  1. Evaporation

  2. Condensation

  3. Precipitation

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

Evaporation is the process by which water evaporates from the surface of the Earth and turns into water vapor.