Test: Polymers (Old NCERT) - NEET MCQ

Macromolecule is made by joining smaller molecules(monomers)by covalent bond formation.

Polymer cannot be classified on the basis of their resistance to different agents.

This is copolymer is polymer made up of different monomers.

Teflon has CF₂=CF₂ as monomer unit.

It is semi synthetic polymer.

Buna N is used in making oil seals , tank linings.

Nylon – 6, 6 Caprolactum is monomer of nylon 6.

Since we are getting monosubstituted alkyl halide so it is neopentane.

Polymer is not semi synthetic. It is synthetic.

They both are biodegradable polymer.

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.

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.

Buna S involves the polymerization of 1, 3 butadiene and styrene.

These monomers form PHBV.

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 is Gyptal.

The correct answer is Option B.
Neoprene is not a condensation polymer. It is an additional polymer.
Neoprene is made from monomer chloroprene (2-chlorobuta-1,3-diene). 
Dacron, Melamine and Glyptal are condensation polymers.
Dacron ( also known as terylene) is a polyester made by condensation polymerisation of ethylene glycol and dimethyl terephthalate.
Glyptal is a copolymer of ethylene glycol and phthalic acid.
Melamine ( or formaldehyde melamine polymer) is obtained from condensation polymerisation of melamine with formaldehyde.

This polymer is polyvinylchloride.

In vulcanization of rubber sulphur crosslinking is introduced.

Bakelite is used in making electrical switches.

The correct answer is Option B.
Novolac
-> Linear structure formed as a product of condensation reaction between phenol and formaldehyde with excess of phenol.
-> It is used in paints

Rubber tree is found in India.

Poly-β−hydroxybutyrate co-β− valerate (PHBV). It is obtained by the copolymerization of 3−hydroxybutyric acid and 3−hydroxypentanoic acid. PHBV is used in specially packaging orthopedic devices and in controlled release of drugs. PHBV undergoes bacterial degradation in the environment.
Nylon−2−. It is an alternating polyamide copolymer of glycine (H₂​N−CH₂​−COOH) and aminocaproic acid [NH₂​(CH₂​)₅COOH] and is biodegradable.

Starch and cellulose occur naturally.