Chromatography

Q.

Define peptization?

Q.

Explain what are so, solidsol, aerosol, emultion, foam, solidfoam, gel along with examples of each and tell what is dispersed phase and dispersed medium in each of them.

Q.

Why gelatin is generally added to ice cream?

Q.

What is chromatography?

Q.

What is chromatography? State its two applications.

Q. How can we obtain the coloured component (dye) from ink?

Q. Chromatography is used to separate:

1. molecules
2. atoms
3. compounds
4. mixtures

Q. What is the dispersed phase?

Q.

Which technique is used in diagnostic laboratories for blood and urine test?

1. Evaporation

2. Magnetic separation

3. Sublimation

4. Centrifugation

Q. Define what is a sublimable substance. Give few examples.

Q.

Which technique is used to separate drugs from blood?

1. Chromatography

2. Evaporation

3. Centrifugation

4. Sublimation

Q.

Which method is usually used to separate coloured substance from each other?

1. Evaporation

2. Filtration

3. Simple distillation

4. Chromatography

Q.

Which technique is used to separate blood cells from plasma?

1. Filtration

2. Sublimation

3. Centrifugation

4. Evaporation

Q. Which type of mixture can be separated by the evaporation technique? State an example of such a mixture.

Q.

Which method of separation is best for investigating the composition of food dyes in sweets?

1. Chromatography

2. Distillation

3. Evaporation

4. Filtration

Q.

How will you separate the color components of a mixture of red and blue ink?

Q. Question 36
A child wanted to separate the mixture of dyes constituting a sample of ink. He marked a line by the ink on the filter paper and placed the filter paper in a glass containing water as shown in the figure. The filter paper was removed when the water moved near the top of the filter paper.
(a) What would you expect to see, if the ink contains three different coloured components?
(b) Name the technique used by the child.
(c) Suggest one more application of this technique.

Q.

Define peptisation and give examples?

Q.

Blood cells can be separated from plasma cells using which of the following methods?

1. Fractional distillation

2. Centrifugation

3. Chromatography

4. Separating funnel

Q. Define the following
Dispersed phase and dispersion medium

Q.

Draw a diagram to show the separation of the components of black ink by paper chromatography.

Q.

Name the technique by which several dyes present in black ink can be separated?

Q.

A commonly used paint solvent?

Q.

What is chromatography, explain the procedure of chromatography with diagram

Q.

Define separation of mixtures

Q.

Vinegar is a ----- solution and milk is a ------- solution.

Q.

Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?

Q. Select the statements that are right with respect to chromatography.

1. It is used to separate components of a mixture
2. In this technique, rate of movement of components is taken advantage of to separate the mixture
3. It is used to separate colours in a dye
4. It is used to separate drugs from blood.

Q.

If we pour hot water on dry ice it will tur into fog. Why?

Q.

What is chromatography? what it used for??