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.
A body of mass 1000 kg is moving horizontally with a velocity of 6 m/s. If 200 kg extra mass is added, the final velocity (in m/s) 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.