Tag: environmental impact: plastics

Questions Related to environmental impact: plastics

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

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  1. True

  2. False

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Correct Option: A
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.

Cooking pans have plastic handles.

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

  1. True

  2. False

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Correct Option: A
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

Plastics are generally good conductors of electricity.

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

  1. True

  2. False

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Correct Option: B
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.

Plastics are mainly used by everyone because :

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  1. They are cheap

  2. Easy to handle

  3. Do not break

  4. Light weight

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Correct Option: A,B,D
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.

Plastic containers can resist decomposition for:

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

  1. 50000

  2. 3000

  3. 1000

  4. 40000

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Correct Option: C
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.

Which of the following takes so many years to degrade?

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  1. Jute

  2. Cotton

  3. Wool

  4. Plastic

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Correct Option: D
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

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

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

  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.

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Correct Option: B

Which of the following substance is bio-degradable?

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

  1. cloth

  2. thermosetting plastic

  3. thermoplastic

  4. PVC pipes

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Correct Option: A
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

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

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

  1. Reduce

  2. Reuse

  3. Recover

  4. Recycle

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Correct Option: A,B,C,D
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.

Burning of plastic causes:

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

  1. water pollution

  2. air pollution

  3. sound pollution

  4. All of these

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Correct Option: B
Explanation:

Burning of plastic produces carbon dioxide which causes heavy air pollution.