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Thermosetting Plastics

synthetic fib...

Question

synthetic fibre catches fire easily, but there is a coating of melamine on the uniforms of firemen. why?

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Solution

Dear Student,
This is because of the fact that melamine is heat resistance.

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Q. Melamine is coated on the uniforms of firemen.

Q. Synthetic fibres catch fire easily.

Q. Why is it not advisable to wear synthetic clothes while bursting fire crackers?

(i) All synthetic fibres are prepared by using raw materials of petroleum origin.

(ii) Synthetic fibres catch fire easily.

(iii) On heating, synthetic fibres melt and stick to the body of the person wearing it.

Q. This section contains 1 Assertion-Reason type question, which has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
इस खण्ड में 1 कथन-कारण प्रकार का प्रश्न है, जिसमें 4 विकल्प (a), (b), (c) तथा (d) दिये गये हैं, जिनमें से केवल एक सही है।

A : The uniforms of firemen have coating of melamine to make them flame resistant.
A : आग बुझाने वाले कर्मचारियों के परिधानों पर मेलामाइन की परत चढ़ी होती है जो उसे अग्निरोधक बनाती है।

R : Synthetic fibres catch fire easily.
R : संश्लेषित रेशे आसानी से आग पकड़ लेते हैं।

Q. Nylon clothes are preferred in kitchens as synthetic fibres do not catch fire easily.

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