Tag: plastic

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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.

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

Which of the following statement is true about PVC (polyvinyl chloride) and polythene?

  1. They are thermoplastics

  2. They are thermosetting plastics

  3. They are examples of natural substances

  4. They are natural fibres
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Thermoplastics on heating get deformed (its shape and size can be altered) and thus can also be bent. On the other hand, thermosetting plastics cannot be bent once moulded. Some examples of Thermoplastics are – Polythene and PVC. Some examples of Thermosetting plastics are – Bakelite and Melamine.


Hence, the correct option is $\text{A}$

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

A material which is not easily decomposed by natural processes is termed as :

  1. biodegradable material

  2. non-biodegradable material

  3. recycled material

  4. natural material
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A material which is not easily decomposed by natural processes is termed as $\text {non-biodegradable material}$. Examples are polyethene, PVC, PS. It takes many years for decomposition. Hence, option B is correct.

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

Which of the following are uses of plastics in health care industry?

  1. Packaging of tablets

  2. Stitching wounds

  3. Syringes

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plastics in health care industry are used in packaging of medicines;plastic threads are used for stitching wounds. Also syringes, gloves and many kind of medical instruments are made up of plastic.

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

Why plastic containers are favoured for storing food?

  1. Plastics are light in weight

  2. Plastic is a strong and durable material

  3. Plastics are easy to handle

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plastics are used to store food because:
(i) Plastics are light in weight.
(ii) Plastic is a strong and durable material and
(iii) plastics are easy to handle.