Discussion Forum



1)

Match the following

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A) A:IV,B:III,C:II,D:I

B) A:II,B:III,C:IV,D:I

C) A:II,B:II,C:I,D:IV

D) A:I,B:IV,C:III, D:II

Answer:

Option B

Explanation:

(A-II)  Neoprene is prepared from chloroprene. 

 1372021922_k10.PNG

Neoprene is synthetic rubber or elastomer and used in laptop sleeves, orthopaedic braces, electrical insulation and automotive fan belts.

(B-III)   Monomer unit of nylon-6  , 6 are adipic acid and hexamethylenediamine.

 137202110_k11.PNG

Nylon-6,6 is fiber and used in airbags, apparel, carpet fibers, oil pans, ball bearing cages, radiation tan etc.

(C-IV)  High-density polyethene (HDP) is prepared in presence of the Ziegler-Natta catalyst.It is harder and opaque  and can withstand somewhat higher temperature for short time periods

(D-I)

  1372021335_k12.PNG

Melamine formaldehyde resin used in kitchen utensils and plates.It is also used in formation of decorative paper.

Melamine-formaldehyde resin tightly packed by cross-linked network.