148.Phenol is used in the manufacture of which one of the following ?

P.V.C.
Nylon
Polystyrene
Bakelite

The correct answer is (d). Bakelite is a thermosetting plastic that is made from phenol and formaldehyde. It is a hard, brittle material that is resistant to heat and chemicals. It is used in a variety of applications, including electrical insulation, cookware, and furniture.

P.V.C. is a type of plastic that is made from vinyl chloride. It is a soft, flexible material that is used in a variety of applications, including pipes, windows, and flooring.

Nylon is a type of plastic that is made from polyamides. It is a strong, durable material that is used in a variety of applications, including clothing, ropes, and carpets.

Polystyrene is a type of plastic that is made from styrene. It is a lightweight, foamy material that is used in a variety of applications, including packaging, insulation, and toys.