Answer the following in one or two sentences.

Questions

3 questions · self-marked practice — reveal the answer and mark yourself.

Question 12 Marks

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

Answer

Question 22 Marks

How is saturated solution of the crude solid prepared?

Answer

A saturated solution of the crude solid is prepared by boiling it in a small but sufficient quantity of a suitable solvent.
The main solute from the sample of the crude solid dissolves to form a saturated solution on boiling.

[Note: The solution is not saturated with respect to the soluble impurities, as they are in small proportion.]

Question 32 Marks

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

Answer

A solid substance may contain two types of impurities:

Chemistry Answer the following in one or two sentences.