Question

The common monomer for both Terylene and Glyptal is

• A.
• B.
• C.
• D.

Hint:

The common monomer for polyesters like Terylene and Glyptal is ethylene glycol (HO-CH₂-CH₂-OH), which links with dicarboxylic acids to form long polymer chains.

Answer 1

The Correct Option is A

Terylene is a polyester formed by the polymerization of terephthalic acid and ethylene glycol. Glyptal is a polymer made from phthalic acid and ethylene glycol. Both of these polymers share ethylene glycol (HO-CH₂-CH₂-OH) as the common monomer. 
Step 1: Terylene is formed by the reaction between terephthalic acid (a benzene ring with two carboxyl groups) and ethylene glycol. Glyptal is made from phthalic acid (a benzene ring with a carboxyl group) and ethylene glycol. 
Step 2: The common monomer for both Terylene and Glyptal is ethylene glycol, which has the structure HO-CH₂-CH₂-OH. Thus, the correct answer is option (1) HO-CH₂-CH₂-OH.