Centrifugation

Q.

What is the use of thistle Funnel in a laboratory and what is the use of pipette in a laboratory what is the use of burette what is the use of pestle and mortar what is the use of China dish in a laboratory

Q. Define intermolecular space?​

Q.

Which of the following method or process is used to get cream from milk?

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

Q. Cream from the milk is separated using centrifugation because:

1. cream is heavier than milk
2. cream and milk have equal weight
3. milk floats over cream
4. cream is lighter than milk

Q.

How can you separate the mixture of salt, sand, and grain?

Q. Most metals sink in water as they have density _______ water.

1. same as that of
2. lower than
3. higher than
4. comparable to

Q. Give reasons:​

(f) When a teaspoon of sugar is added to half a glass of water and stirred the water level in the glass remains unchanged.​

Q.

Centrifugation can be used for:

1. Separation of cream from milk

2. Drying of wet clothes in washing machine

3. Separation of blood components in medical science

4. To obtain salt from seawater

Q.

The separation of particles through centrifugation depends upon the ___ of the constituent particles.

1. Boiling point

2. Size of the particles

3. Melting point

4. Density

Q. Which among the following substances dissolves completely in water?​

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. Explain sieving and give an example.