Tag: ways to reduce non degradable garbage

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Multiple choice chemistry man made materials plastic waste thermocol ways to reduce non degradable garbage

Electrical wires have a coating of an insulated material. The material generally used is :

  1. sulphur

  2. graphite

  3. PVC

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

PVC is an abbreviated form of polyvinyl chloride. The electrical characteristics of PVC such as electrical insulating properties or dielectric constant are excellent and hence, are used as insulating materials.

Multiple choice chemistry man made materials plastic waste thermocol ways to reduce non degradable garbage

The plastics which soften upon being heated but regains all its original properties on cooling are known as:

  1. thermoplastics

  2. thermosetting plastics

  3. thermoelastic

  4. cellulose
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The plastics which soften upon being heated but remain an original properties on cooking are known thermoplastics.

Example: Polythelene, PVC, Acrylic, Nylon and Teflon

Multiple choice chemistry man made materials plastic waste thermocol ways to reduce non degradable garbage

Plastic can be used for:

  1. polythene bags

  2. food packaging

  3. electrical appliances

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

Plastic in today's world plays a very important role in day to day life. They are most commonly used as polythene bags (carry bags). Also they are used in food industry for packaging as wrappers, tetra packs for milk etc. Plastics can be good thermal insulator. Hence, can be used to coat all the electrical appliances.

Multiple choice chemistry man made materials plastic waste thermocol ways to reduce non degradable garbage

______ are the substances are capable of molding and casting into various shapes and sizes.

  1. Thermosettig plastic

  2. Thermoplastic

  3. Polyamide

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

Thermoplastics are materials which become soft on heating and gets hardened when cooled. This process of heating and cooling can be performed several times on thermoplastic without significant change in its characteristics. Due to these properties, thermoplastics can be molded and cast into various shapes and sizes

Multiple choice chemistry man made materials plastic waste thermocol ways to reduce non degradable garbage

Which of the following is used in automobile battery casings?

  1. HDPE

  2. PP

  3. PVC

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

 The purpose of a battery casing is for enclosing and hermetically sealing a battery body which converts chemical energy into electrical energy in order to generate current to power an electronic device. 

Battery casing is manufactured in layers. The casing layers are developed from various raw materials and can include one or two, for example, polyethylene terephthalate layers, a polymer layer, and a polypropylene layer. 


Among the given option the correct answer is B.

Multiple choice chemistry man made materials plastic waste thermocol ways to reduce non degradable garbage

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

  1. LDPE

  2. PS

  3. PP

  4. PVC
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A paper cup is a disposable cup made out of paper and often lined or coated with plastic or wax to prevent liquid from leaking out or soaking through the paper. Disposable cups are made up of Polystyrene (PS).

The main advantages of polystyrene cups are-

They use fewer raw materials and their manufacturing process consumes less energy and produces less waste than that of paper cups.
 Polystyrene cups are also lighter than paper ones, which leads to lower transport costs.
Option B is correct.