Tag: polymer

Quizzes (7) Questions (194)

Questions Related to polymer

Multiple choice chemistry petrochemicals and polymers addition polymerisation types of polymerisation reactions polymer

Which is used in making various types of pipes?

  1. PVR

  2. PVC

  3. Bakelite

  4. Melamine
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
PVC (polyvinyl chloride) is used in making various types of pipes.
Note: PVC thermoplastic polymer. Its properties are between elastomers and fibers. On heating, it becomes soft and on cooling, become hard. It can be remoulded and recycled.
Multiple choice chemistry petrochemicals and polymers addition polymerisation types of polymerisation reactions polymer

PVC is an example of which kind of plastic?

  1. Thermoplastic

  2. Thermosetting

  3. It is not a type of plastic
  4. Both $A$ and $B$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

PVC (polyvinyl chloride) is thermoplastic polymer. Its properties are between elastomers and fibers. On heating, it becomes soft and on cooling, become hard. It can be remoulded and recycled.

Multiple choice chemistry petrochemicals and polymers addition polymerisation types of polymerisation reactions polymer

Which of the following polymer has the tendency of decomposing before melting ?

  1. Polystyrene

  2. PVC

  3. Nylon

  4. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Thermosetting polymers such as Bakelite have the tendency of decomposing before melting. Thermoplastic polymers (such as PVC (polyvinyl chloride), polystyrene ) on heating, becomes soft and on cooling, become hard. They can be remolded and recycled. Their properties are between elastomers and fibers.
There is no thermosetting given in the option, all are thermoplastic.
Hence, the correct option is D.
Multiple choice chemistry petrochemicals and polymers addition polymerisation types of polymerisation reactions polymer

In condensation of polymerization, involves monomers which contain functional groups of:

  1. same kind

  2. different kind

  3. all groups

  4. compounds
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Condensation polymers involves monomers which join together losing a small molecules as byproducts such as $H _2O$, methanol, etc.

Condensation polymers are formed from two or more different monomers.

Multiple choice chemistry petrochemicals and polymers addition polymerisation types of polymerisation reactions polymer

Polymer formation from monomers starts by:

  1. condensation reaction between monomers

  2. coordination reaction between monomers

  3. conversion of monomers to monomer ion by protons

  4. hydrolysis of monomers
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Polymer formation from monomers starts by condensation reaction between monomers by removal of small molecules.

Multiple choice chemistry petrochemicals and polymers addition polymerisation types of polymerisation reactions polymer

Earlier, gramophone records were made from a natural resin, shellac, which comes from insects on trees. Nowadays, records lighter in weight are made from synthetic plastics like:

  1. polyacrylonitrile

  2. PVC (or polyvinyl chloride)

  3. polythene

  4. bakelite
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

They are made from PVC (or polyvinylchloride) because they are hard and non-breakable.