MHTCET 13 Apr 2026 Shift 2 Paper

Concept:Chain growth polymerisation is also called addition polymerisation, where unsaturated monomers combine repeatedly to form a long chain.Explanation:Teflon is obtained by the addition polymerisation of tetrafluoroethene, $\mathrm{CF}_{2}=\mathrm{CF}_{2}$.The reaction can be shown as:$n\,\mathrm{CF}_{2}=\mathrm{CF}_{2} \rightarrow \left(-\mathrm{CF}_{2}-\mathrm{CF}_{2}-\right)_n$Since the monomer units simply add together without loss of any small molecule, Teflon is a chain growth polymer.The remaining options are condensation polymers:Nylon-6 and Nylon-66 are polyamides formed by condensation polymerisation, while Terylene is a polyester made from ethylene glycol and terephthalic acid.Therefore, among the given choices, only Teflon is a chain growth polymer.Answer:Option B: Teflon.