Tag: environmental impact: plastics

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Questions Related to environmental impact: plastics

Multiple choice chemistry man made materials environmental impact: plastics plastic plastic plastic waste garbage in, garbage out

Teflon is a special plastic on which oil and water do not stick.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Teflon is a synthetic polymer (polytetrafluoroethylene) that can be used to cover the surface of certain object and imparts nonstick properties to it. Teflon is used for Non Stick material because the monomer units are hydrophobic in nature (tetrafluoroethylene) and thus oil and water do not stick to it.
option A is correct.

Multiple choice chemistry man made materials environmental impact: plastics plastic plastic plastic waste garbage in, garbage out

Cooking pans have plastic handles.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Plastics are categorized into thermosoftening/thermoplastic and thermosetting/thermoset plastics.
In thermosoftening plastics, the forces between the polymer chains are weak, so they can easily be remoulded into new shapes. This makes it possible to recycle this type of plastic. whereas in thermosetting plastics there are strong covalent bonds forming cross-links between the polymer chains, making these plastics hard and rigid. Once set into its original shape, a thermosetting plastic can't be softened and remoulded. The strong bonds between polymers also mean that thermosetting plastics are much more heat resistant than thermosoftening ones.
Cooking pans' handle are made from thermosetting plastic like bakelite as this is resistant to heat.
option A is correct

Multiple choice chemistry man made materials environmental impact: plastics plastic plastic plastic waste garbage in, garbage out

Plastics are generally good conductors of electricity.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plastics are high molecular weight (macromolecular or polymeric) organic substances that have usually been synthesized from low molecular weight compounds. Being organic origin have no ionic character in them and thus can not conduct electricity. They are insulators.
Hence, option $B$ is correct.

Multiple choice chemistry man made materials environmental impact: plastics plastic plastic plastic waste garbage in, garbage out

Plastics are mainly used by everyone because :

  1. They are cheap

  2. Easy to handle

  3. Do not break

  4. Light weight
Reveal answer Fill a bubble to check yourself
A,B,D Correct answer
Explanation

Plastics find many applications in day-to-day life because of various reasons as :


1) They are economical, thus are cheap.
2) Easy to handle unlike ceramics and glass which are brittle.
3) Light weight materials and easy to carry.
4) High durability but they are breakable.

Therefore option A, B and D are correct.

Multiple choice chemistry man made materials environmental impact: plastics plastic plastic plastic waste garbage in, garbage out

Plastic containers can resist decomposition for:

  1. 50000

  2. 3000

  3. 1000

  4. 40000
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Plastic waste is one of many types of wastes that take too long to decompose. Normally, plastic items can take up to 1000 years to decompose in landfills. But plastic bags we use in our everyday life take 10-1000 years to decompose, while plastic bottles can take 450 years or more.

Multiple choice chemistry man made materials environmental impact: plastics plastic plastic plastic waste garbage in, garbage out

Which of the following takes so many years to degrade?

  1. Jute

  2. Cotton

  3. Wool

  4. Plastic
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Non-biodegradable materials are not degraded by natural factors such as micro-organisms such as bacteria, UV radiations etc. They stay longer and difficult to degrade.
Jute, cotton and wool are made from natural fibre and are therefore biodegradable while plastic is a synthetic polymer and is non-biodegradable waste.
option D isc orrect
Multiple choice chemistry man made materials environmental impact: plastics plastic plastic plastic waste garbage in, garbage out

We come to a conclusion, that plastics are bad conductors of electricity from the followings:

  1. Refrigerators and freezers have a plastic foam core.

  2. Electrical wires have a plastic covering.

  3. Cooking pans have plastic handles.

  4. It is used to prepare parachutes.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Electrical wires are covered in plastic because plastic is an insulator (bad conductor), which prevents electricity from leaking or causing shocks.

Multiple choice chemistry man made materials environmental impact: plastics plastic plastic plastic waste garbage in, garbage out

Which of the following substance is bio-degradable?

  1. cloth

  2. thermosetting plastic

  3. thermoplastic

  4. PVC pipes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Biodegradable wastes are such waste materials which are and can be degraded by natural factors like microbes (e.g. bacteria, fungi and few more), abiotic elements like temperature, UV, oxygen, etc. Example: kitchen wastes and other natural wastes. Cloth is a natural polymer made from cellulose, cotton, silk, wool etc and is biodegradable while plastics (thermoplastic, thermosetting plastics, PVC) are synthetic polymers and are non-biodegradable
option A is correct
Multiple choice chemistry man made materials environmental impact: plastics plastic plastic plastic waste garbage in, garbage out

These processes can be used to prevent health hazards of plastics :

  1. Reduce

  2. Reuse

  3. Recover

  4. Recycle
Reveal answer Fill a bubble to check yourself
A,B,C,D Correct answer
Explanation

 

A number of waste prevention techniques are available, and they are commonly summarized as the so-called 4Rs: reduction, reuse, recycling and recovery. 

Reduction, reuse and recycling are known in the industry as the 3Rs. 

We must reduce the use of resources as much as possible and save them for the future generation. Reducing usage is a method of conservation of resources.

Therefore, A, B, C and D option are correct.