JEE Main · 2021 · 22 Jul 2021 · Shift 2 · Polymers

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Match List - I with List - II:

List - I
(a) Chloroprene
(b) Neoprene
(c) Acrylonitrile
(d) Isoprene

List - II
(i) (see structure)
(ii) (see structure)
(iii) (see structure)
(iv)

CH_{2} = CH - CN

Choose the correct answer from the options given below:

(A)(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
(B)(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
(C)(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
(D)(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)✓ Correct

Answer: (D)

Solution

Chloroprene is 2-chloro-1,3-butadiene,

C H_{2} = C (Cl) - CH = C H_{2}

. Neoprene is the addition polymer of chloroprene, so its repeating unit is a chain segment carrying chlorine on an internal double bond. Acrylonitrile is vinyl cyanide,

C H_{2} = CH - CN

. Isoprene is 2-methyl-1,3-butadiene,

C H_{2} = C (C H_{3}) - CH = C H_{2}

. The pairing is chloroprene with the chloro-substituted butadiene, neoprene with the chlorinated polymer chain, acrylonitrile with

C H_{2} = CH - CN

and isoprene with the methyl-substituted butadiene.

JEE Main · 2021 · 22 Jul 2021 · Shift 2 · Single correct option

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JEE Main · 2021 · 22 Jul 2021 · Shift 2 · Polymers

Solution

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