Tag: matter in our surroundings

Quizzes (3) Questions (101)

Questions Related to matter in our surroundings

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

The ordered arrangement of solid breaks when:

  1. kinetic energy increases

  2. kinetic energy decreases

  3. no change in kinetic energy

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

Solids have least amount of kinetic energy. When the kinetic energy increases, the velocity of particles increases. The particles collide with a greater force. Thus, the ordered arrangement of solid breaks which results in phase change.

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.