Which of the following is fully fluorinated polymer?

• Neoprene

• Teflon

• Thiokol

• Thiokol

Super glue or crazy glue is

• poly (methyl methacrylate)

• poly (ethyl acrylate)

• poly (methyl -cyanoacrylate)

• poly (ethyl methacrylate)

Which of the following has an ester linkage?

• Nylon-66

• Dacron

• PVC

• Bakelite

Which metal aprons are worn by radiographer to protect him from radiation?

• Mercury coated apron

• Lead apron

• Copper apron

• Aluminimised apron

Nylon-66 is not

• condensation polymer

• polyamide

• both (a) and (b)

• None of the above

Terylene is the polyester of

• hexamethylene diamine and adipic acid

• vinyl chloride and formaldehyde

• melamine and formaldehyde

• ethylene glycol and terephthalic acid

Adipic acid is used in the preparation of

• nylon-6

• dacron

• nylon-66

• novolac

Terylene is a polymer obtained from

• ethylene glycol and glycerol

• ethylene glycol and glyceraldehyde

• ethylene glycol and terephthalic acid

• None of the above

19.

Rayon is

• natural silk

• artificial silk

• regenerated fibre

• synthetic fibre

For the formation of terylene the number of moles of ethylene glycol required per mole of terephthalic acid is

• 1

• 2

• 3

• 4