Centrifugation

Q.

What is a complexing agent?

Q.

What is the advantage of using centrifugation method?

Q.

Give reasons for the following:
Ammonia solution is used to remove oil and grease stains from clothes

Q.

Which among the following method is most suitable to separate cream from milk?

1. Filtration
2. Centrifugation
3. Distillation
4. Separating funnel

Q.

The principle which is used to separate the cream from milk is __ .

1. Centrifugation

2. Distillation

3. Evaporation

4. Crystallization

Q.

Impure water can be purified by the process of ___________ .

1. Precipitation

2. Distillation

3. Evaporation

4. Decantation

Q.

In which of the following cases, centrifugation process is used for separation?

1. Used in salt manufacturing plants to separate salt from water.

2. Used in diagnostic laboratories for the separation of blood cells from blood.

3. Used in dairies to separate butter from cream.

4. Used in washing machines to separate water from wet clothes.

Q.

In which of the following cases, the centrifugation process is used for separation?

1. Used in salt manufacturing plants to separate salt from water.

2. Used in diagnostic laboratories for separation of different components in blood.

3. Used in dairies to separate butter from cream.

4. Used in washing machines to separate water from wet clothes.

Q.

Which of the following best describes liquids?

1. No definite volume and no definite shape
2. Definite shape and volume
3. Definite volume but no definite shape

4. Definite shape and no definite volume

Q.

Sunita's grandmother is suffering from jaundice. Her doctor advised her to drink milk with less fat content. Which of the following mentioned would be the most appropriate for Sunita to prepare it?

1. Chromatography

2. Centrifugation

3. Fractional distillation

4. Distillation

Q.

Which of the following is an application of centrifugation?

1. Pathological test of blood and urine

2. Preparing lactic cultures

3. Washing machine

4. All of above

Q.

Which one of the following methods is used to separate acetone from water?

1. Evapoartion

2. Centrigugation

3. Crystallization

4. Sedimentation

Q. Question 13
You are provided with a mixture of petroleum and water. Can you suggest a method to separate the two?

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Q.

The various components of crude oil are separated by the process of _______ .

1. fractional crystallization

2. evaporation and cooling

3. sedimentation and decantation

4. fractional distillation

Q. In centrifugation, lighter particles are forced to the bottom and heavier particles stay on top.

1. False
2. True

Q. What is the principle of centrifugation? List two daily-life uses of centrifugation.

Q.

A mixture of sulphur powder and water can be separated by _______ .

1. Sedimentation

2. Distillation

3. Decantation

4. Filtration

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

1. crystallization
2. evaporation
3. centrifugation

Q. A student set up the following apparatus to separate ethanol and water. What was wrong with his arrangement?

Q.

Which of the following is true?

1. Water is squeezed out of the wet clothes due to spinning action of the washing machine

2. Water from wet clothes is removed by heating in the washing machine

3. Water from wet clothes is removed due to evaporation

4. Water from wet clothes is removed due to heating and evaporation

Q. Which of the following method is used for the separation of different components of petroleum?

1. Fractional distillation
2. Sublimation
3. Chromatography
4. Simple distillation

Q.

Which among the following method is most suitable to separate cream from milk?

1. Filtration
2. Centrifugation
3. Distillation
4. Separating funnel

Q. Which of the following will take the shape of the container?

1. Rocks
2. Bricks
3. Cake
4. Sugar solution
5. Ink
6. Tea
7. Oil
8. Pen
9. Water
10. Lemonade

Q. Washing machines use the method of centrifugation to squeeze out water from wet clothes.

1. False
2. True

Q.

Which among the following method is most suitable to separate cream from milk?

1. Filtration
2. Centrifugation
3. Distillation
4. Separating funnel