Centrifugation

Q. Give two examples for each of the following :​
Solid + Solid mixture​

Q.

What is CsCl density gradient centrifugation?

Q.

Cream from the milk is separated by centrifugation because:

1. cream is lighter than milk

2. cream is heavier than milk

3. cream floats over milk

4. the cream is lighter than milk and comes over it

Q.

Name the technique used to squeeze out water from wet clothes while drying in a washing machine.

Q.

Which method will you use to get a pure liquid if it has dissolved impurities present in it?

Q.

Cream can be separated from milk using the centrifugal method because:

1. cream floats over milk

2. cream is lighter than milk

3. cream is heavier than milk

4. the cream is lighter than milk and comes over it

Q.

45 Ashrafs grandmother is a diabetic patient. Her doctor advised him to control your sugar level in his diet by taking less sugar and less fat content. So, she always prefers to take lassi instead of milk. Ashraf asked her mother then she explained the process of making Lassi by removing cream from the curd. She told him this method is going churning.

Read the passage and answer the following questions.

(a) Explain the process of churning.

Q.

Rehan filters out tea leaves from the prepared tea with a strainer. The separation technique he used is _______.

1. distillation

2. condensation

3. filtration

4. evaporation

Q.

How will you separate a solid from a liquid by the centrifugation method?

Q.

1. What is the principle of Centrifugation?

2. What are the applications of Centrifugation?

Q.

Which of the following mixtures can be separated into its constituents using centrifugation?

1. Sugar water

2. Saltwater

3. Air

4. Blood

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> What is the principle of centrifugation? List some daily-life uses of centrifugation.

Q.

Look at the picture and answer the questions that follow.

(a) What is the process involved called?

(b) What type of mixtures can be separated by this method?

(c) Give one example.

Q.

Anu wants to make a cake for Priya for her birthday. Because of bad weather she could not go out and but she has 5 litres of milk with her. How can she get cream from the milk?

1. Fractional distillation

2. Crystallization

3. Sublimation

4. Centrifugation

Q. The method used to separate cream from milk is _________.

1. centrifugation
2. distillation
3. evaporation
4. fractional distillation

Q.

A mixture of sand and NH₄Cl can be separated by the _____ method

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> What is the importance of centrifugation? How is it done?

Q. Identify the liquid-in-gas type of mixture from the following.

1. Dissolved oxygen in water
2. Dissolved carbon dioxide in water
3. Droplets of water in air
4. Nitrogen in air

Q.

1 Which process is used to separate butter from milk?

Q.

What is the term used for explaining the separation of suspended materials with higher density to stick to the walls?

1. Decantation

2. Centrifugation

3. Centripetal motion

4. Distillation

Q.

Identify the examples where centrifugation is used.

1. Used to separate salt from water

2. Used in diagnostic laboratories for blood tests

3. Used in dairies to separate butter from cream

4. Used in washing machines to squeeze out water from wet clothes

Q. [TBQ.4(a)]
Give scientific reasons:
Buttermilk is churned to get butter.

Q. What type of mixture are separated by centrifugation?

1. Separating chalk powder from water
2. Separating water from textiles
3. Removing fat from milk to produce skimmed milk
4. All of these

Q.

Find the odd one out. Give a reason for your choice.

1. funnel

2. filter paper

3. beaker

4. condenser

Q.

Ammonium Chloride and Salt is separated by ______________________ process and the volatile component among these is ____________________.

1. Sublimation, Ammonium Chloride

2. Centrifugation, salt

3. Centrifugation, Ammonium Chloride

4. Sublimation, Salt