Which of the following are made of polyamides ?

Wool

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Natural silk

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Rayon

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Nylon

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Solution

The correct options are
A Wool
B Natural silk
D Nylon
Polyamide, any polymer or substance composed of long, multiple-unit molecules in which the repeating units in the molecular chain are linked together by amide groups. Amide groups have the general chemical formula $C O - N H$ .

(A) Wool - It is a polyamide.
(B) Natural silk - It is a polyamide.
(C) Rayon - It is not a polyamide.
(D) Nylon - It is a polyamide.

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