science
Grade-5
Easy

Question

Which of the following options is correct for the following statements?
(i). Plastics are generally poor conductors of electricity.
(ii). Melamine is a special plastic on which oil and water do not stick.
(iii). Ropes made by Bakelite are used in cranes and elevators

hintHint:

Different type of plastics have different properties and thus different applications.

The correct answer is:


    • Plastics are organic in nature meaning they are made up of carbon hence they do not possess any ionic character and do not conduct electricity.
    • The special plastic on which oil and water do not stick is Poly-Tetra-Fluoroethylene (PTFE), commonly known as Teflon
    • Ropes of cranes and elevators are generally made up of nylon due to high tensile strength.

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