Nylon-66 is not an elastomer; it is a synthetic polymer that belongs to the class of polyamides. Elastomers are polymers that possess rubber-like elasticity, such as natural rubber or synthetic rubbers like polyisoprene.
So, the correct option is (A): Nylon-66 is an example of elastomer.
The portion of the line \( 4x + 5y = 20 \) in the first quadrant is trisected by the lines \( L_1 \) and \( L_2 \) passing through the origin. The tangent of an angle between the lines \( L_1 \) and \( L_2 \) is:
Neoprene is formed from chloroprene. It is prepared by free radical polymerisation. The monomer of neoprene is chloroprene. It is used for preparing gaskets, conveyor belts etc.