Well...this is an interesting ppt... and also humourus. this is at leat about 9 slides. please spare a little time on this ppt. it is done for the students of grade 10 especially... it can also be viewed by anyone else... I will be thanfull if i get a couple more downloads and likes...for more upcoming ppt for gr 10 then just follow me in google+ or comment below.

1. Introduction Of Salt

2. Overview…
Salt (NaCl), sodium chloride, mineral substance of great
importance. The mineral form halite, or rock salt, is
sometimes called common salt to distinguish it from a class
of chemical compounds called salts.

3. Properties
Salt is essential to the health of both people and animals. Table salt,
used universally as a seasoning, is fine-grained and of high purity. To
ensure that this hygroscopic (i.e., water-attracting) substance will
remain free-flowing when exposed to the atmosphere. Iodized salt—
that is, salt to which small quantities of potassium iodide have been
added—is widely used in areas where iodine is lacking from the diet, a
deficiency that can cause swelling of the thyroid gland, commonly
called goitre. Livestock also require salt; it is often made available in
solid blocks.

4. Uses Of Salt
The meat-packing, sausage-making, fish-curing, and food-processing
industries use salt as a preservative or seasoning or both. It is employed
for curing and preserving hides and as a brine for refrigeration.
In the chemical industry, salt is required in the manufacture of sodium
bicarbonate (baking soda), sodium hydroxide (caustic soda), hydrochloric
acid, chlorine, and many other chemicals. Salt is also employed in soap
and enters into metallurgical processes as a flux (a substance promoting
fusing of metals).
When applied to snow or ice, salt lowers the melting point of the
mixture. Thus, large amounts are used in northern climates to help rid
thoroughfares of accumulated snow and ice. Salt is used in water-
softening equipment that removes calcium and magnesium compounds
from water.

5. 5
Medical
Uses
Of
Salt.

6. The History Of Salt
In some parts of the Western Hemisphere and in India, the
use of salt was introduced by Europeans, but in parts of
central Africa it is still a luxury available only to the rich.
Where people live mainly on milk and raw or roasted meat
(so that its natural salts are not lost), sodium chloride
supplements are unnecessary; nomads with their flocks of
sheep or herds of cattle, for example, never eat salt with
their food. On the other hand, people who live mostly on
cereal, vegetable, or boiled meat diets require supplements
of salt.

8. DONE!!

9. Any Questions?
Post in the comments section below…