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Question

Which among the following are commonly used for making a safety pin?


A

Wood and glass

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B

Plastic and glass

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C

Leather and plastic

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D

Steel and plastic

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Solution

The correct option is D

Steel and plastic


Explanation for correct option:

D. Steel and plastic

The materials that are commonly used for making safety pins are steel and plastic.

Properties of steel:

  • Steel is hard and tough in nature.
  • It has high tensile strength.
  • It is light in weight but high in strength.
  • Safety pins are made up of steel to get sharp points.

Properties of plastic:

  • Plastics are light in weight and chemically stable.
  • Thye can be molded into different shapes.
  • They have low thermal conductivity.
  • Plastic is sued in safety pins to seal the edges.

Explanation for incorrect options:

The materials that are commonly used for making safety pins are steel and plastic. Thus options A, B, and C are incorrect.

Hence, the correct option is D i.e. Steel and plastic.


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