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| 1. |
Which of the following statements are correct about phenol-formaldehyde resin?A. Novolac or resol is a linear polymer and is used in the manufacture of adhesive.B. Bakelite is a cross-linked polymer and is used in making switches and plugs.C. Novolac is preparede when `(P//F)` (phenol//formaldehyde) ratio is greater than 1, Whereas bakelite is prepared when `(P//F)` ratio is less than 1.D. Novolac is prepared when `P//Flt1` , and bakelite is prepared when `P//F`gt1` . |
| Answer» Correct Answer - A::B::C | |