Tag: chemistry

Questions Related to chemistry

Which of the following is used in automobile battery casings?

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  1. HDPE

  2. PP

  3. PVC

  4. Polyester

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Correct Option: B
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.

These are generally the bad conductors of heat :

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  1. Synthetic fibres

  2. Natural fibres

  3. Cranes

  4. Plastics

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Correct Option: D
Explanation:

Plastic is a poor conductor of heat and electricity. This makes it suitable to make the covering of electric wires, handles of electrical appliances, handles of utensils, kitchenware etc.

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

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  1. LDPE

  2. PS

  3. PP

  4. PVC

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Correct Option: B
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.

These processes can be used to prevent health hazards of plastics

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

  1. Reduce

  2. Reuse

  3. Recover

  4. Recycle

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Correct Option: A,B,C,D

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,C,D
Explanation:

Plastics are mainly used by everyone because it is light weight, cheap, easy to handle and does not break easily.

Which of the following are examples of transparent material?

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  1. Glass

  2. Water

  3. Plastic

  4. All of these

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Correct Option: D
Explanation:

Glass, water, plastic(some types) are examples of transparent material as the light can pass through them.  

 Which of the following object(s) is/are made of plastics?

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  1. Buckets

  2. Lunch boxes

  3. Toys

  4. Water containers

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Correct Option: A,B,C,D
Explanation:

All of them are made of plastics because plastic is durable, non- corrosive, light in weight and inexpensive. Thus buckets, lunch boxes, toys, water containers, pipes, etc. are made up of plastic.

Which of the following material is not used in making plate?

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  1. Steel

  2. Glass

  3. Plastics

  4. Leather

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Correct Option: D
Explanation:

Steel, glass, plastics are used in making plates.

The leather is used for making clothes and shoes.

Polymeric organic materials are called:

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  1. elastics

  2. plastics

  3. polythenes

  4. None of these

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Correct Option: B
Explanation:

Polymeric organic materials are called plastics.

Most plastics are synthetic solids composed of petroleum in long chain of polymer bonds.

The use of plastic material polyesters is in:

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  1. toys

  2. combs

  3. recording tapes

  4. All of the above

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Correct Option: C
Explanation:

Plastic material polyester used in Recording tapes. 

Toys and combs are made up of PVC and bakelite.