Fill in the blanks using proper works:

i. Rubber made by vulcanization is a …………… material.

ii. Man-made materials are made by …………… natural materials.

iii. …………… thread was developed simultaneously in New York and London.

iv. Rayon is also known as …………… .

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1 Answers

i. hard

ii. processing

iii. Nylon

iv. synthetic silk

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