CBSE
Multiple Choice QuestionsWhich of the following statements is incorrect?
Polypropylene is a thermoplastic polymer
Melamine-formaldehyde is a thermosetting polymer
Mixture of styrene and methyl methacrylate can form ionic addition polymer
Low-density polythene is a poor conductor of electricity
Buna-N, a synthetic rubber is copolymer of
H2C = CH - CH = CH2 and H5C6 - CH = CH2
H2C = CH - CN and H2C = CH - CH = CH2
H2C = CH - CCl = CH2 and H2C = CH - CH = CH2
H2C = CN - CN and H2C = CH - CCl = CH2
The monomer of teflon is
CHF = CH2
CF2 = CF2
CHCl = CHCl
CHF = CHCl
The monomers of terylene are
phenol and formaldehyde
ethylene glycol and phthalic acid
adipic acid and hexamethylenediamine
ethylene glycol and terephthalic acid
An example of natural biopolymer is
teflon
nylon-66
rubber
DNA
Styrene can be purified by
simple distillation
fractional distillation
steam distillation
vacuum distillation
Heating of rubber with sulphur is called
vulcanisation
galvanisation
sulphonation
bessemerisation
Polypropylene can be obtained by polymerisation of
CH2 CH - CH2 - Cl
CH2 CH - Cl
CH3 - Cl
CH3 - CHCl2
The condensation polymer among the following is
rubber
protein
PVC
polyethene
Consider the following reaction,
benzoic acid
salicylic acid
Phenol
Aniline
