For macromolecules to form, one more of the following criteria are essential
Macromolecule is made by joining smaller molecules(monomers)by covalent bond formation.
One of the statements below is not true for the classification of polymers can be classified on the basis of their
Polymer cannot be classified on the basis of their resistance to different agents.
Identify the type of polymer. —A—B—B—A—A—A—B—A—
This is copolymer is polymer made up of different monomers.
Which of the following polymers have tetrafluoroethene monomer units?
Teflon has CF2=CF2 as monomer unit.
Cellulose acetate (rayon) and cellulose nitrate are __________ polymers
It is semi synthetic polymer.
One of the following rubbers is used in making oil seals, tank lining, etc.
Buna N is used in making oil seals , tank linings.
Which of the following polymer can be formed by using the monomer unit represented below?
Nylon – 6, 6 Caprolactum is monomer of nylon 6.
Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide?
Since we are getting monosubstituted alkyl halide so it is neopentane.
Polythene is not one of the following?
Polymer is not semi synthetic. It is synthetic.
Nylon – 2 – Nylon – 6 is
They both are biodegradable polymer.
Which of the following statements about low density polythene is FALSE?
Low density polythene : It is obtained by the polymerisation of ethene under high presure of 1000-2000 atm. at a temp. of 350 K to 570 K in the pressure of traces of dioxygen or a peroxide initiator (cont). Low density polythene is chemically inert and poor conductor of electricity. It is used for manufacture squeeze bottles. toys and flexible pipes.
One of the following is used in speciality packaging, orthopaedic devices and in controlled release of drugs.
PHBV [Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)] find its applications in controlled release of drugs, medical implants and repairs, speciality packaging, orthopaedic devices and manufacturing bottles for consumer goods.
Formation of Buna – S, involves polymerization of
Buna S involves the polymerization of 1, 3 butadiene and styrene.
In the following reaction, the polymer formed is ?
These monomers form PHBV.
Dacron is manufactured by heating a mixture of ethylene glycol and terephthalic acid with one of the Conditions given below.
Dacron is manufactured by heating a mixture of ethylene glycol and terephthalic acid at 420 to 460K in presence of SnO3 as catalyst.
Painting material among the following is
Painting material is Gyptal.
Which one of the following is not a condensation polymer?
The below molecule is called?
This polymer is polyvinylchloride.
In vulcanisarion of rubber,
In vulcanization of rubber sulphur crosslinking is introduced.
Bakelite is used for making
Bakelite is used in making electrical switches.
The correct name of the polymer below is:
Rubber tree is found in
Rubber tree is found in India.
Which of the following monomers form biodegradable polymers?
The polymers which are easily decomposed and not harmful for the environment are known as a biodegradable polymer.
(i) PHBV, being a biodegradable polymer, is obtained by condensation polymerization of 3 hydroxybutanoic acid and 3 hxydroypentanoic acid.
Which polymers occur naturally in nature
Starch and cellulose occur naturally.