Take the repeat unit of Terylene as -[O-CH2-CH2-O-CO-C6H4-CO]- (benzene ring 1,4-disubstituted, formula C10H8O4). Which statements are correct?

It is a condensation polymer, and ester links form between the diol and the diacid (or its ester).

Its repeat unit has a molar mass of 192 g/mol.

Its chains are essentially linear and the polymer is thermoplastic.

It is a condensation polymer, and ester links form between the diol and the diacid (or its ester).

Its repeat unit has a molar mass of 192 g/mol.

It is an addition polymer of an alkene monomer.

Its chains are essentially linear and the polymer is thermoplastic.

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3pl070

Take the repeat unit of Terylene as $- [O - CH X_{2} - CH X_{2} - O - CO - C X_{6} H X_{4} - CO] X^{-}$ (benzene ring 1,4-disubstituted, formula $C X_{10} H X_{8} O X_{4}$ ). Which statements are correct?

AIt is a condensation polymer, and ester links form between the diol and the diacid (or its ester).
BIts repeat unit has a molar mass of 192 g/mol.
CIt is an addition polymer of an alkene monomer.
DIts chains are essentially linear and the polymer is thermoplastic.

The repeat unit

C X_{10} H X_{8} O X_{4}

has mass

120 + 8 + 64 = 192

. It contains ester linkages, so it forms by condensation of a diol with a diacid, giving linear thermoplastic chains. It is not an addition polymer.