Advertisements
Advertisements
Question
What is chromatography ? State its two applications.
Advertisements
Solution
Chromatography is a technique used for separating two or more dissolved solids, which are present in the solution in small quantities.
Separation is based on the fact that two or more substances are soluble in the solvent but their solubility is different.
This technique has various important applications:
- To separate dyes present in black ink
- It is used in forensic science to detect and identify the trace amounts of poison present in the stomach.
APPEARS IN
RELATED QUESTIONS
Fill in the blank :
The state of matter with definite volume and definite shape is called______
Fill in the blank
Liquids have a definite ______
Name one element, one compound and one mixture.
Which of the following are not compounds ?
Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond
What is meant by (i) elements (ii) compounds, and (iii) mixtures ?Write down the names of two elements, two compounds and two mixtures.
The elements which normally exist in the liquid state are :
Out of a colloid, solution and a suspension :
which one has the smallest particles ?
State whether colloidal solutions are homogeneous or heterogeneous.
How much water should be added to 15 grams of salt to obtain 15 per cent salt solution ?
If 25 mL of acetone is present in 150 mL of its aqueous solution, calculate the concentration of solution.
Define solvent.
Which of the following do not exhibit Tyndall effect ?
Starch solution, Sugar solution, Ink, Salt solution, Copper sulphate solution, Ammonium chloride solution, Fog, Smoke, Car exhausts.
Name the source from which nitrogen and oxygen are obtained on a large scale.
Fill in the following blanks with suitable words :
Immiscible liquids are separated by using a .....................
The particles in the matter are extremely small and can be seen even with a powerful microscope.
The non S I and S I units of some physical quantities are given in column A and column B respectively. Match the units belonging to the same physical quantity:
| (A) | (B) | ||
| (a) | degree celsius | (i) | kilogram |
| (b) | centimetre | (ii) | pascal |
| (c) | gram per centimetre cube | (iii) | metre |
| (d) | bar | (iv) | kelvin |
| (e) | milligram | (v) | kilogram per metre cube |
Examples of foam are ______.
Define the term matter.
Define the term matter.
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
