Basic Analytical Techniques Chemistry - Basic Analytical Techniques

Colourless components on chromatogram can not be observed by the following :

A mixture of acetone and benzene can be seperated by the following method :

Which technique is widely used in industry to seperate components of mixture and also to purify them ?

Which of the following techniques is used for seperation of glycerol from soap in soap industry ?

Which of the following methods can be used to separate two compounds with different solubilities in the same solvent?

Name the following:
i. A glass plate coated with a thin layer of silica gel.
ii. A spraying agent used for the visualization of amino acids.

State the principle of partition chromatography.

Name the physical state each of stationary phase and mobile phase in partition chromatography.

How is TLC plate or chromplate prepared?

Match the following:

	Process		Used in the purification/separation of
i.	Crystallization	a.	Acetone and benzene
ii.	Simple distillation	b.	Benzoic acid and water
iii.	Fractional distillation	c.	Impure copper sulphate
iv.	Solvent extraction	d.	Acetone and water

Give names of two materials used as stationary phase in chromatography.

How is saturated solution of the crude solid prepared?

What are the different types of impurities that a solid may contain?

How do you visualize colourless compounds after separation in TLC and Paper Chromatography?

Why do we see bands separating in column chromatography?

Name the different types of Chromatography and explain the principles underlying them.

List the properties of solvents which make them suitable for crystallization.

Define a. Solvent extraction
b. Distillation.

Compare TLC and Paper Chromatography techniques.

Label the diagram and explain the process in your words.

Write a short note on Rf value.

Describe the process of paper chromatography.

In a chemical laboratory, Priyal was asked to isolate an organic compound from its aqueous solution. She added ethyl acetate to the given sample, separated the organic layer and kept it for evaporation. At the end of her practical, Priyal found few crystals in the beaker which she kept for evaporation. Answer the following questions:
i. In the above passage, which method was used by Priyal for separation? State its principle.
ii. Why do you think the organic compound dissolved in ethyl acetate?
iii. Illustrate the method of separation used in the passage with an example.

Describe the process of thin layer chromatography (TLC) and separation of components in it.

Give a brief description of column chromatography with an illustration.

What is chromatography? Explain the principle behind it.

Write the principle of solvent extraction and explain the process with labelled diagram.