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Real Life Applications
4 min read

The P-Block Elements

- Wondering why to study this chapter? Know the real world use of it
Chlorine Chemistry

Probably the most familiar use of chlorine is as a disinfectant. But there are lot of other places where chlorine is working for you.
For instance, chlorine plays an important role in harnessing solar energy - It helps in purifying the silicon found in grains of sand and transform them into solar panel chips. The story of chlorine in the energy generating sector doesn't end here.
It extends to harnessing energy from wind.
The blades of wind turbine are made from chlorine based compound which convert wind energy into electrical energy. The electrical energy produced by using chlorine is more efficient and greenhouse gas free.
Chlorine has made our modern lives better and comfortable -
It is used in manufacturing fast processors of our mobile phones, tablets and air conditioners. It is even used in paints which make our houses beautiful
Even the country's defence system depends on chlorine - it is used in manufacturing bullet proof jackets and other protective equipments worn by the army.

What to fill your tyres with : Air or Nitrogen

Air is used to inflate tyres of most other vehicles such as cars, bikes, buses, etc.
But air can be problematic. It is mostly because of its moisture content - which can lead to formation of rust on cars wheels. If we replace air by nitrogen, such issues do not come up.
Additionally, nitrogen molecules are larger than air or oxygen molecules - Making it difficult for nitrogen molecules to leak out of the tyres easily. So, a tyre filled with nitrogen gas will maintain its pressure much longer.
And for the same reason, many racing cars fill the tyres with nitrogen - it does not contain moisture and the tyre pressure stays consistent.
Nitric Acid: Boon or Bane!
It could be any of the two!
Let's find out.
Concentrated nitric acid is pretty corrosive - it can burn our skin. But the harmful acid has many applications
Nitric acid is used in the production of fertilisers such as ammonium nitrate, calcium nitrate, etc., required for the healthy growth of crops. So, nitric acid is advantageous to the soil and crops.
In a major industrial use, nitric acid is used in pickling of stainless steel - it removes the heat tinted layer of metal which helps in regaining its corrosion resistant surface.
The dyes which we use for colouring our clothes are manufactured by using nitric acid.
Additionally, nitric acid is used in manufacture of explosives like Picric acid, TNT and RDX.
This could be a bane if used for wrong purposes.
Iodine an Essential Nutrient
Iodine has the symbol I. It is one of the heaviest stable halogens and exists as a black, shiny crystalline solid.
This heavy halogen is essential in our body for the production of thyroid hormone. The human body can not produce iodine on its own - we have add it in our diet. So, the good news is that iodine is found in many food stuff.
Low iodine intake makes it difficult for our bodies to make thyroid hormone. It eventually leads to enlargement of the thyroid gland - a condition known as Goitre.
We, however, do not require massive amounts of iodine in our body. 5 grams of iodine are enough for an individual with a lifespan of 70 years. Let's end with an interesting bit of information - Radioactive isotope of iodine is helpful in curing cancerous thyroid gland.