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Question
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Orlon has monomeric unit of :
(A) acrolein
(B) glycol
(C) vinyl cyanide
(D) isoprene

Answer Verified Verified
Hint: Orlon is the commercial name for the polymer polyacrylonitrile. Since orlon is a homo polymer, it is easy to find the repeating unit. The repeating unit found is the monomer for orlon also called as polyacrylonitrile.

Complete answer:
-Orlon is a synthetic acrylic fiber, which is used in the textile industry. The fiber is resistant to sunlight and atmospheric gases.
-This property of Orlon makes it suitable for outdoor uses. It is resistant to shrinkage and has a soft and warm feel. It is used in the manufacture of overcoating. Dress fabrics. Knitted wear, and washable woven sportswear.
-Orlon is an addition polymer. Let us draw the structure of Orlon to find the repeating unit.

From the above structure we find that the repeating structure is acrylonitrile.
The common name for acrylonitrile is vinyl cyanide. This is because the common name for the nitrile functional group is cyanide and the nitrile functional group is attached at the vinyl position of the C=C double bond, hence the name vinyl cyanide.
The structure for vinyl cyanide is given below:

So, the correct answer is “Option C”.

Note: In the options given, acrolein is one of the options. Do not get confused between acrolein and acrylonitrile as acrolein has an aldehyde functional group and acryl nitrile has a nitrile functional group.