JEE Main 2021 (26 Feb, Shift 1) Chemistry Q48: Polymers

Question

The structure of Neoprene is :

Accepted Answer

Option 2: [figure: repeat unit in square brackets with subscript n: $\mathrm{CH_2{-}C{=}CH{-}CH_2}$ with Cl attached above the C]

Answer

[figure: repeat unit in square brackets with subscript n: $\mathrm{CH_2CH{=}CH{-}CH_2{-}CH_2{-}CH}$ with CN attached below the last CH]

Answer

[figure: repeat unit in square brackets with subscript n: $\mathrm{CH_2{-}C{=}CH{-}CH_2}$ with Cl attached above the C]

Answer

[figure: repeat unit in square brackets with subscript n: a six-membered ring of alternating C and N atoms (three N, drawn with alternating double bonds), HN- on one ring carbon (bracket bond at left), $\mathrm{NHCH_2}$ on another ring carbon (bracket bond at right), and NH with an open bond pointing down on the third ring carbon]

Answer

[figure: repeat unit in square brackets with subscript n: $\mathrm{CH_2{-}CH}$ with CN attached below the CH]

JEE Main 26 February 2021, Shift 1, Chemistry Q48

Same idea in other shifts