Q1 of 18 Page 48

Explain why some Fibres are called synthetic?

There are two categories of Fibres:-

1) Natural – Obtained from plants and animals.


2) Man-made – prepared by a scientist in labs with the help of reagents. Since some Fibres belong to the category of man-made, hence they are synthetic.


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2

Give reasons why plastic containers are used as storage devices?

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Classify following materials which can be, cannot be recycled.

Plastic toys, electrical switches, plastic chairs, ball point pens, plastic containers, cooker handles, plastic bottles, carry bags, tumblers, tooth brush, plastic chapels. plastic plates, plastic buckets

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If electric switches are made by thermoplastics what would happen?

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Thermoplastics are eco-friendly than thermosetting plastics. What do you say? Why?