371.

Teflon is an example of polymer which is a/ an

• polyamide

• addition polymer

• polyester

• formaldehyde resin

Which of the following are addition polymers?

• Nylon

• Melamine formaldehyde resin

• Orlon

• All of these

Which pair of polymers have similar properties?

• Nylon, PVC

• PAN, PTFE

• PCTFE, PTFE

• Bakelite, alkyle resin

Which of the following is a monomer of Dacron?

• H₂C=C(Cl)-CH=CH₂

• 

• HOH₂C-CH₂OH

• CH₂=CH-CH=CH₂

Identify condensation homopolymer from the following:

The poly dispersity index (PDI) of a polymer is ($\stackrel{-}{\mathrm{M}}$_w = weight average molecular mass and $\stackrel{-}{\mathrm{M}}$_n = number average molecular mass)

• the product $\stackrel{-}{{\mathrm{M}}_{\mathrm{n}}} \mathrm{and} \stackrel{-}{{\mathrm{M}}_{\mathrm{w}}}$

• the sum of $\stackrel{-}{{\mathrm{M}}_{\mathrm{n}}} \mathrm{and} \stackrel{-}{{\mathrm{M}}_{\mathrm{w}}}$

• the difference between $\stackrel{-}{{\mathrm{M}}_{\mathrm{w}}} \mathrm{and} \stackrel{-}{{\mathrm{M}}_{\mathrm{n}}}$

• the ratio between $\stackrel{-}{{\mathrm{M}}_{\mathrm{w}}} \mathrm{and} \stackrel{-}{{\mathrm{M}}_{\mathrm{n}}}$

The monomers of buna-S rubber are

• lsoprene and butadiene

• Butadiene and phenol

• Styrene and butadiene

• Vinyl chloride and sulphur

The structure of Nylon–6 is:

Which of the following compounds is a constituent of the polymer?

[-HN-CO-NH-CH₂-]_n

• Ammonia

• Methylamine

• Formaldehyde

• N-methyl urea

Which of the following is a condensation polymer?

• Buna-S

• Teflon

• Nylon 6,6

• Neoprene