BITSAT Chemistry Polymers

Question: Which of the following can be repeatedly soften on heating? (i) Polystyrene (ii) Melamine (iii) Polyesters (iv) Polyethylene (v) Neoprene

a) (i) and (iii)

b) (i) and (iv)

c) (iii), (iv) and (v)

d) (ii) and (iv)

Answer: (i) and (iv)

Question: Formation of polyethylene from calcium carbide takes place as follows

The amount of polyethylene obtained from 64.1 kg of CaC₂ is

a) 7 kg

b) 14 kg

c) 21 kg

d) 28 kg

Answer: 28 kg

Question: Polymer used in bullet proof glass is

a) Lexan

b) PMMA

c) Nomex

d) Kevlar

Answer: PMMA

Question: Which one of the following monomers gives the polymer neoprene on polymerization ?

a) CF₂ = CF₂

b) CH₂ = CHCl

c) CCl₂ = CCl₂

d)

Answer:

Question: Ebonite is

a) Natural rubber

b) Synthetic rubber

c) Highly vulcanized rubber

d) Polypropene

Answer: Highly vulcanized rubber

Question: Biodegradable polymer which can be produced from glycine and aminocaproic acid is :

a) PHBV

b) Buna - N

c) Nylon 6, 6

d) Nylon 2- nylon 6

Answer: Nylon 2- nylon 6

Question: Polymer formation from monomers starts by

a) Condensation reaction between monomers

b) Coordinate reaction between monomers

c) Conversion of monomer to monomer ions by protons

d) Hydrolysis of monomers

Answer: Condensation reaction between monomers

Question: Which of the following can be repeatedly soften on heating? (i) Polystyrene (ii) Melamine (iii) Polyesters (iv) Polyethylene (v) Neoprene

a) (i) and (iii)

b) (i) and (iv)

c) (iii), (iv) and (v)

d) (ii) and (iv)

Answer: (i) and (iv)

Question: Polymer used in bullet proof glass is

a) Lexan

b) PMMA

c) Nomex

d) Kevlar

Answer: PMMA

Question: Ebonite is

a) Natural rubber

b) Synthetic rubber

c) Highly vulcanized rubber

d) Polypropene

Answer: Highly vulcanized rubber