Sublimation

Q.

Which among the following undergoes sublimation?

1. Camphor, Ice, Mercury

2. Iodine, Camphor, Carbon dioxide

3. Iodine, Camphor, Nickel

4. Ammonium chloride, Iron, Zinc

Q.

Define sublimation. Name any three substances that sublime.

Q.

How would you perform an activity to understand the process of sublimation?

Q.

Solid substances that undergo sublimation

Q. is the process of conversion of a substance directly from solid state to its gaseous state.

1. Sublimation
2. Evaporation
3. Condensation
4. Diffusion

Q.

The process by which a solid directly converts into its vapor state is called___

Q.

Which of the following apparatus is not required in sublimation?

1. Condenser

2. China Dish

3. Funnel

4. Wire gauze

Q.

Define sublimation and sublimate. Give one example of sublimation.

Q.

How would you obtain pure ammonium chloride solution when it contains potassium chloride as an impurity?

Q.

Naphthalene balls disappear with time without leaving any solid.

Q. Why does the size of naphthalene balls decrease when left out in the open?

1. Due to fusion
2. Due to evaporation
3. None of the above
4. Due to sublimation

Q.

The conversion of vapors into solid without passing through the liquid state is called ……………..

Q. The process in which a solid directly changes into gaseous state is called evaporation.

1. True
2. False

Q.

Which of the following does not undergo sublimation?

1. Sodium chloride

2. Ammonium chloride

3. Camphor

4. Iodine

Q.

Why do we classify the liquids as good conductors and poor conductors instead of conductors and insulators? Explain with an example. [3 MARKS]

Q.

The process of conversion of a solid into a gas without undergoing its liquid state is called

1. Evaporation

2. Fusion

3. Sublimation

4. Condensation

Q.

The process of sublimation is used on a large scale to obtain common salt from seawater.

1. True
2. False

Q. What is sublimation? Mention any two solids that undergo sublimation.

Q.

Name a substance that sublimes.

Q.

What is sublimation? give two examples of substances undergoing sublimation.

Q. Identify the reaction which is just opposite to sublimation .

1. vaporization
2. condensation
3. freezing
4. deposition
5. melting

Q. The change from solid state to vapour state without passing through the liquid state is called:

1. Fusion
2. sublimation
3. Regulation
4. Vaporisation

Q.

Answer in Brief:How does the state of water change with change in temperature

Q.

How one can use the sublimation process to separate different compounds from the mixture?

1. Using an evaporation of the sublimable substance.

2. Using evaporation and condensation of the sublimable substance.

3. Using liquid to gas conversion.

4. Using solid to liquid conversion

Q.

Naphthalene balls become smaller in size when kept exposed for a few days, due to sublimation.

1. True

2. False

Q.

Define deposition.

Q.

Write true or false for the following statement.

the process of conversion of vapors into solid without passing through the liquid state is called condensation.

1. True
2. False

Q. The process that is involved when a substance changes to gas directly from the solid state without changing to the liquid state is ________.

Q.

What happens when you pour some acetone on your palm?

Q.

Explain the principle of sublimation.