Advantages of Using Plastics
Plastic is non reactive
Plastic do not react with Air and Water
Example - Chairs and buckets are made up of plastics
Plastic do not react with chemicals like acid and base(resist corrosion)
Example - Chemicals used at home for cleansing are kept in plastic bottles instead of metal containers
Plastic is light,strong and durable
Plastics are light in weight,easily available,good in strength and long lasting(durable)
Example-Plastic containers are used for storing food,water,pickles and soft drinks.
Plastic is lighter than metals so they are also used in Aircrafts and Cars
Plastics are poor conductors of electricity
They do not allow electricity to pass through them.
- Electric wires have plastic covering to protect us from electric current
- Screwdriver used by the electricians are also made of plastics
- Electric switches,plugs and sockets have plastic covers
Plastics are poor conductors of heat
They do not allow heat to reach our hands
- Handles of cooking utensils are made of plastic so that we can hold the hot utensil easily
- Some plastics are also used to make microwave safe utensil.On heating of microwave,the food gets heated but the utensil is not affected
Oil and Water do not stick on a plastic called Teflon,So Teflon coating is used in utensils
Melamine Plastics do not catch fire easily
So they are used to make uniform of fireman which makes them flame resistant
Disadvantages of Using Plastics
Plastics are Non Biodegradable
They do not get easily decomposed by natural processes
They take hundreds of years to decompose
Burning of Plastics cause air pollution
The burning process in the synthetic material is quite slow and it does not get completely burnt easily.
On burning, lots of poisonous gas is released which is harmful to environment
Plastic Bags are Harmful for Animals
Polythene Bags are thrown in garbage
Animals like Cow look for food in garbage
They accidentally swallow(eat) plastic which chokes their respiratory system(lungs)
NCERT Question 5 - Explain why plastic containers are favoured for storing food.
NCERT Question 10 - Give examples to show that plastics are non corrosive in nature.
NCERT Question 12 - Avoid plastics as far as possible’. Comment on this advice
NCERT Question 13 - Match the terms of column I correctly with the phrases given in column II
(a) Prepared by using wood pulp
(b) Used for making parachutes and stockings
(c) Used to make non-stick cookwares
(d) Fabrics do not wrinkle easily