Q29 / 150 · MHT CET 2025 (26 Apr Shift 2) · Chemistry

Identify the monomers used in preparation of dacron .

  • A
    $\mathrm{C}_6 \mathrm{H}_5 \mathrm{OH}$ and $\mathrm{CH}_2 \mathrm{O}$
  • B
    $\mathrm{H}_2 \mathrm{C}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}_2$ and $\mathrm{H}_2 \mathrm{C}=\mathrm{CH}-\mathrm{CN}$
  • Correct answer
    C
    Figure
  • D
    $\mathrm{H}_2 \mathrm{C}=\mathrm{CH}-\mathrm{CN}$ and $\mathrm{C}_6 \mathrm{H}_5 \mathrm{OH}$

Solution

Dacron (Terylene) is a polyester formed by condensation polymerization between a dicarboxylic acid and a diol. The specific monomers are ethylene glycol (ethane-1,2-diol) and terephthalic acid (benzene-1,4-dicarboxylic acid).

Option A represents phenol and formaldehyde, monomers for Bakelite. Option B contains 1,3-butadiene and acrylonitrile, monomers for Buna-N rubber. Option D includes acrylonitrile and phenol, unrelated to polyester synthesis.

Option C contains the correct monomers: $\mathrm{HO}(\mathrm{CH}_2)_2\mathrm{OH}$ (ethylene glycol) and $\mathrm{HO}\mathrm{C}(=\mathrm{O})\mathrm{C}_6\mathrm{H}_4\mathrm{C}(=\mathrm{O})\mathrm{OH}$ (terephthalic acid).

The final answer is $\boxed{\text{C}}$.

Hence, the correct answer is option: 'C'.

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