Tag: man made materials

Questions Related to man made materials

A non-biodegradable waste is:

chemistry man made materials plastic and environment pollution due to plastics environmental impact: plastics

  1. Metallic tins

  2. Plastic

  3. Polythene

  4. All the above

Show answer
Correct Option: D
Explanation:

Non-Biodegradable wastes cannot be recycled and they give out toxic substances and pollute the surroundings.


Hence, option D is correct.

What is recycling?

chemistry man made materials plastic and environment pollution due to plastics environmental impact: plastics

  1. Burning of material

  2. Break down the material by natural process

  3. Recovering and reprocessing the material into useful products

  4. Burying the products in land

Show answer
Correct Option: C
Explanation:

Plastic recycling is the process of recovering scrap or waste plastic and reprocessing the material into useful products, sometimes completely different in form from their original state.

Cotton cloth requires _______ to decompose.

chemistry man made materials plastic and environment pollution due to plastics environmental impact: plastics

  1. more than 15 years

  2. 10-15 years

  3. 100 years

  4. 2-5 months

Show answer
Correct Option: D
Explanation:

Cotton is a natural fibre. It consists of natural components. . It is a renewable resource, the production requires little energy, Cotton takes 2 to 5 months to decompose.

What are biodegradable compounds?

chemistry man made materials plastic and environment pollution due to plastics environmental impact: plastics

  1. Compounds which can not be decomposed

  2. Compounds which can be decomposed by man-made processes

  3. Compounds which can be decomposed by natural processes

  4. All of the above

Show answer
Correct Option: C
Explanation:

Biodegradable compounds are compounds which get disposed through natural processes, such as action of bacteria. e.g peels of fruits, vegetables, paper.

Which out of the following is used for making disposable cups?

chemistry man made materials plastic and environment pollution due to plastics environmental impact: plastics

  1. LDFE

  2. PS

  3. PP

  4. PVC

Show answer
Correct Option: B
Explanation:

Polystyrene (PS) is used for making disposable cups.
Polystrene is one of the most widely used kind of thermo plastic. It can be cast into moulds with fine detail.

To which of the following 4R principle apply most?

chemistry man made materials plastic and environment pollution due to plastics environmental impact: plastics

  1. Synthetic fibre

  2. Natural fibre

  3. Plastic

  4. Metals

Show answer
Correct Option: C
Explanation:
4R principle was develped for solid waste management and stands for:
Reduce-the use of non-biodegradable materials,
Reuse-materials again and again,
Recycle-use the materials that can be recycled, and
Recovery-of lacking substances
It is mostly applicable to plastics because they are widely used in day-to-day life and are non-biodegradable possesing threat to the ecology.
Option C is correct.

Which of the following is non biodegradable?

chemistry man made materials plastic and environment pollution due to plastics environmental impact: plastics

  1. Plastic

  2. Cotton

  3. Paper

  4. Left over food stuff

Show answer
Correct Option: A
Explanation:

Biodegradation is the disintegration of materials by bacterial, fungi or other biological means.

Most plastics are derived from propylene, a simple chemical component of petroleum. When heated up in the presence of a catalyst, individual chemical units monomers of propylene link together by forming extremely strong carbon-carbon bonds with each other. This results in polymers long chains of monomers called polypropylene.
While cotton, paper and left over food stuff are decomposable by bacterial action so Option A is correct.

Which of the following products can't be decomposed easily?

chemistry man made materials plastic and environment pollution due to plastics environmental impact: plastics

  1. Acrylic

  2. Polyethene

  3. Plastic

  4. All of the above

Show answer
Correct Option: D
Explanation:

These substances are non-biodegradable which cannot be decomposed by microorganisms. These products do not break down naturally. When we dispose of them in a garbage pile, the air, moisture, climate, or soil cannot break them down naturally to be dissolved with the surrounding land. They are not biodegradable. However natural waste and products made from nature break down easily when they are disposed of as waste.


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

Which of the following material take the longest to degenerate ?

chemistry man made materials plastic and environment pollution due to plastics environmental impact: plastics

  1. Paper

  2. Cotton cloth

  3. Tin can

  4. Plastic bags

Show answer
Correct Option: D
Explanation:

Plastic bags, because they are complex polymer of long chain hydrocarbons.It is non biodegradable. Plastic bags do not break down naturally. When we dispose them in a garbage pile, the air, moisture, climate, or soil cannot break them down naturally to be dissolved with the surrounding land. However natural waste and products made from nature break down easily when they are disposed as waste.

Substances which cannot be decomposed by micro organisms are called :

chemistry man made materials plastic and environment pollution due to plastics environmental impact: plastics

  1. Biodegradable substances

  2. Non biodegradable substances

  3. Convertable subtances

  4. Non -convertable

Show answer
Correct Option: B