Question

Which is the example of collide?
1) neon 2) bromine 3) jelly

Answer 1

Answer:

incorrect answer is = jelly

Answer 2

Jelly is example of colloid.

Colloid is a substance that consist of particles larger than atoms , too small to be seen with naked eyes.

colloidal system can be eliminated or generated by nature.

• colloids are thin films and fibres , sizes about 10⁻⁷ to 10 ⁻³cm.
• colloidal system includes dispersion of one substance in another .

Examples of colloidal systems -

• smoke particles in air
• Single material such as rubber or the membrane of biological cells.

Classification of colloids

• Reversible system - The products of a physical or chemical reaction interact to reproduce original components. Example - polymers
• Irreversible system - In this type of system in which products of a reaction are stable and can not be reproduced to original components , example - emulsions , solutions, foams and a variety of gels etc .

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