Separation by Evaporation

Q.

The physical process of converting a liquid into its gaseous state is called ___________________.

1. sublimation

2. evaporation

3. condensation

4. melting

Q.

Boiling causes a cooling effect.

1. True
2. False

Q. When water is cooled, it gets converted into ice by a process called P and when water is heated, it gets converted into the steam by the process Q. Identify the processes P and Q.

1. P: Vapourisation
   Q: Solidification
2. P: Solidification
   Q: Melting
3. P: Condensation
   Q: Melting
4. P: Solidification
   Q: Vapourisation

Q.

The process through which liquid changes into its gaseous state is known as ________.

Q.

Sodium chloride and sand are mixed in water. The resultant mixture is heated for a long time. What will we find at the end?

1. Only sodium chloride

2. Sodium chloride and sand

3. Only sand

4. Only sodium

Q.

What is vaporisation?

Q.

Evaporation is the physical process of converting solid to gas.

1. evaporation

2. condensation

Q. Assertion :Paper chromatography is a type of partition chromatography. Reason: Moving phase is liquid and stationary phase is solid.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Which among the given statements are correct about evaporation?

1. It involves conversion from liquid to gaseous state.
2. It happens below the boiling point of the liquid.
3. It happens above the boiling point of the liquid.
4. It can happen at any temperature.

Q. Which of the following process gives salt from sea water?

1. Filtration
2. Centrifugation
3. Melting
4. Evaporation

Q.

Sodium chloride and sand is mixed in water. The resultant mixture is heated for a long time. What will be the end products of this process?

1. Only sodium chloride

2. Sodium chloride and sand

3. Only sand

4. Only sodium

Q.

Evaporation is the physical process of converting _______________.

1. condensation

2. sublimation

3. melting

4. evaporation

Q.

Sodium chloride and sand is mixed in water. The resultant mixture is heated for a long time. What will be the end products of this process?

1. Sodium chloride and sand

2. Only sodium chloride

3. Only sand

4. Only sodium

Q.

The physical process of converting liquid to gas is called ___________________.

1. evaporation

2. condensation

3. sublimation

4. melting

Q.

We heat ink to obtain the coloured component (dye) in a watch glass (similar to a glass cup). The process involved here is ______ and the component removed from ink is ________.

1. Condensation, oil

2. Evaporation, water

3. Melting, water vapour

4. Sublimation, water vapour