Synthetic Fibers And Plastics

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class VIII ANKITA (TGT SCIENCE)KV CRPF YELAHANKA

NAME:

The first fully synthetic plastic was *

1 point

bakelite

melamine

teflon

polythene

Polyester is a long chain polymer of a chemical substance called *

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aldehyde

ester

alcohol

ethene

Ans:b

The polymers in which smaller units are linked to each other in straight arrangement are called *

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cross-linked polymers

branched polymers

linear polymers

all the above

What do you mean by 4-R Principle? *

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REUSE, REDUCE,RECYCLE,REPURPOSE

REDO, REDUCE, RECYCLE,REPURPOSE

RETAIN, REFRAIN,REUSE, REDO

REPURPOSE, REDUCE, RECYCLE, REDO

Select the articles from the following list which are biodegradable. *

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paper

Wollen clothes

wood

aluminium care

plastic bag

peels of vegetables

Required

Which of the following is not a common property of plastics?

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(a) Non-reactive

(b) Light in weight

(d) Good conductor of electricity

Clear selection

A plastic used for making crockery is ______.

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bakelite

melamine

polythene

acrylic

Clear selection

A bucket made of plastic does not rust like a bucket made of iron. Why? *

1 point

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