Chemistry · 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 chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

On cooling gases and liquids, temperature _______, intermolecular attraction ________, and intermolecular space between molecules __________.

  1. falls, decreases, increases

  2. rises, increases, decreases

  3. falls, increases, decreases

  4. rises, decreases, increases
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

On cooling gases and liquids, temperature falls intermolecular attraction increases intermolecular space between molecules decreases.

Multiple choice chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

The phenomenon of change from one state of matter to another and then back to the original state is called ___________.

  1. changing the state of matter

  2. inter-conversion of states of matter

  3. converting the state of matter

  4. all of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The phenomenon of change from one state of matter to another and then back to the original state is called the inter-conversion of states of matter.

Multiple choice chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

Inter-conversion of states of matter is affected by:

  1. changing the temperature.

  2. increasing or decreasing the pressure.

  3. changing both temperature and pressure.

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Inter-conversion of states of matter is affected by 1. Changing the temperature.
2. Increasing or decreasing the pressure.
3. Changing both temperature and pressure.

Multiple choice chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

What is sublimation?

  1. the change of state of a substance directly from solid to gas without changing into a liquid state.

  2. the process of change of matter from the liquid state to the solid state at a particular temperature.

  3. the process of change from the gaseous state to the liquid state at a particular temperature.

  4. all of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The change of state of a substance directly from solid to gas without changing into a liquid state is known as sublimation.

Multiple choice chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

Which of the following statements is false for inter-conversion of matter based on kinetic theory of gases, when a gas/liquid is cooled?

  1. the temperature falls

  2. particles gain energy

  3. inter-molecular attraction increases

  4. inter-molecular space between the particles/molecules of gases decreases
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

On cooling gases/liquid, the temperature falls. Particles gain energy. Intermolecular attraction increases. Intermolecular space between the particles/molecules of gases decreases.

Multiple choice chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

 At the melting point, the solid and liquid phase exist in:

  1. equilibrium

  2. no equilibrium

  3. same kinetic energy

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

At the melting point the solid and liquid phase exist in equilibrium. The melting point of a substance depends on pressure and is usually specified at standard pressure. When considered as the temperature of the reverse change from liquid to solid, it is referred to as the freezing point or crystallization point. 

Multiple choice chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

Evaporation occurs .................... the boiling point.

  1. below

  2. above

  3. equal

  4. both b and c
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Evaporation occurs below the boiling point of the liquid. The particles escape from the surface of the liquid to form gas. Evaporation differs from boiling in that it only takes place at the surface of the liquid and it is very slow. On the other hand, boiling takes place throughout the liquid and is very fast.

Multiple choice chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

During melting, the temperature:

  1. increases

  2. falls

  3. constant

  4. increases and then decreases
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

During melting, the temperature remains constant. This is because the heat energy is taken in by the particles to overcome forces between them instead of being used to raise the temperature.