Polymers

More Topic from Chemistry

Question 1

Among the following substituted silanes the one which will give rise to cross linked silicone polymer on hydrolysis is

  • R4Si

  • RSiCl3

  • R2SiCl2 

  • R3SiCl

Solution

B.

RSiCl3

Question 2

Bakelite is obtained from phenol by reacting with

  • (CH2OH)2

  • CH3CHO

  • CH3COCH3

  • HCHO

Solution

D.

HCHO

Question 3

Buna-N synthetic rubber is a copolymer of

  • space space space space space space space space space space space space space space space space space space space space space space space Cl space space space space space
space space space space space space space space space space space space space space space space space space space space space space space vertical line
space straight H subscript 2 straight C equals CH minus straight C equals CH subscript 2 and
    H2C = CH – CH = CH2

  • H2C = CH – CH = CH2 and
    H5C6 – CH = CH2

  • H2C = CH – CN and H2C = CH – CH = CH2

  • H2C = CH – CN and  straight H subscript 2 straight C space equals space CH space minus space straight C space equals space CH subscript 2
space space space space space space space space space space space space space space space space space space space space space space space space space space vertical line
space space space space space space space space space space space space space space space space space space space space space space space space space CH subscript 3

Solution

C.

H2C = CH – CN and H2C = CH – CH = CH2

Question 4

The formation of which of the following polymers involves hydrolysis reaction?

  • Nylon 6

  • Bakelite

  • Nylon 6, 6

  • Terylene

Solution

A.

Nylon 6

Formation of Nylon-6 involves hydrolysis of its monomer (caprolactum) in the initial state.

Question 5

The polymer containing strong intermolecular forces e.g. hydrogen bonding is

  • natural rubber

  • Teflon

  • Nylon 6,6

  • Polystyrene

Solution

C.

Nylon 6,6

Nylon-6, 6 is a fibre, it contains intermolecular hydrogen bonding.  Nylon-6,6 has amide linkage and hydrogen bond are formed between -CONH- a group of successive chains.