Which pair of polymers have similar properties?
(A) Nylon, PVC
(B) PAN,PTFE
(C) PCTFE,PTFE
(D) Bakelite, alkyl resin

Hint: Any of a group of organic or synthetic compounds known as polymers are made up of macromolecules, or very large molecules, which are just multiples of simpler chemical building blocks known as monomers. Numerous natural and man-made materials, as well as a large portion of the components in living things, are composed of polymers.

Complete Step by Step Solution:
In polymer chemistry, polymerization is the process of joining monomer molecules to form polymer chains or three-dimensional networks by a chemical reaction. Different techniques exist to classify the various types of polymerization. Due to the functional groups contained in the reactants and their inherent steric effects, polymerization in chemical compounds can take place through a variety of reaction processes that vary in complexity.

Numerous applications can be found for polytetrafluoroethylene (PTFE), a synthetic fluoropolymer of tetrafluoroethylene.

Polytetrafluoroethylene, a high-molecular-weight polymer made entirely of fluorine and carbon, is a fluorocarbon solid. Due to the strong electronegativity of fluorine in fluorocarbons, which exhibits reduced London dispersion forces, PTFE is hydrophobic, meaning that neither water nor things containing water can wet it. One of the lowest coefficients of friction of any substance is found in PTFE.

The thermoplastic chlorofluoropolymer known as polychlorotrifluoroethylene (PCTFE or PTFCE) has the molecular formula \[{\left( {{\text{C}}{{\text{F}}_{\text{2}}}{\text{CClF}}} \right)_{\text{n}}}\], where n is the number of monomer units in the polymer molecule. It is comparable to polytetrafluoroethene (PTFE), except instead of tetrafluoroethene, it is a homopolymer of chlorotrifluoroethylene (CTFE). Of all plastics, it transmits water vapour at the slowest rate.

The carbon backbone of both PCTFE and PTFE is the same, so they might have the same chemical properties.
Hence option (C) is correct.

Note: Due to the functional groups contained in the reactants and their inherent steric effects, polymerization in chemical compounds can take place through a variety of reaction processes that vary in complexity. Alkenes undergo comparatively straightforward radical reactions to create polymers in more straightforward polymerizations; in contrast, substitution reactions at a carbonyl group need more complicated synthesis because of the way the reactants polymerize. The polymerization of alkanes is also possible, but only with the aid of potent acids.