Q4 of 18 Page 48

If electric switches are made by thermoplastics what would happen?

1) We Know that thermoplastic is kinds of plastics that have a low melting point.


2) So in case of voltage fluctuations, the current in the wire increases due to which temperature increases.


3) The heat is enough to melt down the electrical switches and after some time upon being cooled the switch will assume a different shape which is undesirable.


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2

Give reasons why plastic containers are used as storage devices?

 3

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

 5

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

 6

Explain following.

a) Blending b) Biodegradable c) Recycling d) Decomposition