The structure of the monomer used for the preparation of plexiglass is
1.
2.
3.
4.
The polymer that is used as a substitute for wool in making commercial fibres is -
1. Melamine
2. Nylon-6, 6
3. Polyacrylonitrile
4. Buna-N
Polyamide is represented by:
1. Teflon
2. Nylon – 6,6
3. Terylene
4. Bakelite
Plastic household crockery is prepared by using :
1. Melamine and tetrafluoroethane.
2. Malonic acid and hexamethylene imine.
3. Melamine and vinyl acetate.
4. Melamine and formaldehyde.
The polymer that is addition as well as copolymer is:
1. PHBV
2. PVC
3. Buna-S
4. Neoprene
Monomer of natural rubber is:
1. 1, 3-butadiene
2. Isoprene
3. Styrene
4. Chloroprene
In the reaction–
Reagent X is–
1. Triethylaluminium and titanium tetrachloride.
2. Triethyl aluminum.
3. Zeigler Natta Catalyst.
4. Both 1 & 3
Select the correct option based on statements below:
Assertion (A): | Vulcanisation of rubber is heating of synthetic rubber with sulfur. |
Reason (R): | Stiffness is lost in vulcanization. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Dacron is an example of–
1. Elastomer
2. Fibre
3. Polyamide
4. Thermoaddition polymer
Which of the following is an elastomer ?
1. Vulcanized rubber
2. Dacron
3. Polystyrene
4. Melamine