CHAPTER 4 EXPLORING DIVERSITY OF MATTER USING SEPARATION TECHNIQUES.pptx

1. Many substance around us are mixtures. Air, seawater, and
crude oil
Are example of mixtures.
These mixtures may contain useful substance. Hence we need
to separate
Them to be able to make use of the substance.

2. We use Physical separation techniques to separate
mixtures into their components.
These technique do not produce any new substance and
the new substance and the
Original substance are obtained.

3. CHAPTER 4:
EXPLORING DIVERSITY OF MATTER USING
SEPARATION TECHNIQUES

6. The technique used to separate mixture depends on:
• Physical properties of the substances present in the mixture
• Substance to be obtained from the mixture.

19. SEPARATION TECHNIQUES
Magnetic
Attraction
Filtration Evaporation Distillation Paper
Chromatography

21. Magnetic attraction is used to separate magnetic materials
from non magnetic materials - science textbook page 64

22. APPLICATION OF MAGNETIC ATTRACTION
Salvaging of Iron and steel
- Iron and steel are magnetic material. Iron and steel are recovered
from Junkyards so that these metals can be recycled. Recycling irons
prevents It from being used up as metals are limited natural
resources.
Food Processing
We use magnets to remove harmful objects from the food.
- Science book page 68

23. Filtration
- Is the technique used to separate an insoluble solid from the liquid in
a liquid-solid mixture.
Our kidneys remove waste products from the blood through Filtration. In
fact our blood is Filtered about 20-25 times.
- The experiment below shows how filtration is carried out.