Tag: polymers of commercial importance

Questions Related to polymers of commercial importance

Teflon is an example of polymer which is a/an

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. polyamide

  2. addition Ploymer

  3. polyster

  4. formaldehyderesin

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Correct Option: B
Explanation:

TEFLON  -  It is an addition polymer prepared by heating tetrafluoroetane with a free radical.
      $n CF _{2} = CF _{2}  \xrightarrow[High  pressure]{Catalyst} -[CF _{2}-CF _{2}-] _{n}$
   Tetrafluoroetane                                   Teflon
POLYAMIDE  -  These are polymers possessing amide linkage and Teflon doesn't contain any amide linkage.
POLYSTER -  These are polycondensation products of dicarboxylic acids and diols.
FORMALDEHYDE  RESIN - It can refer to many formaldehyde polymers such as melamine formaldehyde, urea formaldehyde, phenol formaldehyde.

For natural polymers, PDI is generally ___

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. $0$

  2. $1$

  3. $100$

  4. $1000$

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Correct Option: B
Explanation:

For natural polymers, PDI (Polydispersity Index) is generally equal to $1$, which means that they are monodisperse. Such polymers are more homogeneous.

Orlon is a polymer of:

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. isoprene

  2. acrolein

  3. glycol

  4. vinyl cyanide

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Correct Option: B
Explanation:
Orlon is the trade name of Polyacrylonitrile (PAN) and is a polymer of acrylonitrile (acrolein).
$CH _2=CH-C\equiv N$
Hence, the correct option is B.

The monomers of Buna-S polymers are:

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. vinyl chloride and vinylidene

  2. styrene and butadiene

  3. acrylonitrile and butadiene

  4. isobutylene and isoprene

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Correct Option: B
Explanation:
Styrene and butadiene 
Because with styrene, rubbers are harder and less rubbery and butadine also influence the property.

Which of the following polymers shows a sharp melting point?

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Butyl rubber

  2. Polystyrene

  3. Bakelite

  4. Nylon-6,6

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Correct Option: B

$PMMA$ is a:

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Polyamide

  2. Copolymer

  3. Step growth polymer

  4. Addition polymer

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Correct Option: B

Natural fibre is :-

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Bakelite

  2. Cellulose

  3. Rubber

  4. Nylon-$6$

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Correct Option: B

Which of the following are made of polyamides ?

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Wool

  2. Natural silk

  3. Rayon

  4. Nylon

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Correct Option: A,B,D

Which one of these is a monomer of Bakelite?

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Vinyl acetate

  2. Tetrafluoroethylene

  3. Formaldehyde

  4. Propylene

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Correct Option: C
Explanation:

Bakelite is a condensation polymer of phenol and formaldehyde. Bakelite is widely used for making molded products.  It was the first plastic made from synthetic components.

Which of the following processes can be used to prepare polystyrene ?

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Anionic

  2. Cationic

  3. Free radicals

  4. Ziegler-Natta

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Correct Option: A,B,C,D