Which of the following can be electroplated with chromium ? A. Bakelite B. Graphite C. Steel D. Teflon
(a) A and B (b) B and C (c) only C (d) B and D
Which of the following metals should be electroplated on a tiffin box made of steel ? (a) copper (b) chromium (c) silver (d) tin
Which of the following polymers are condensation polymers?
(a) Bakelite
(b) Teflon
(c) Buty rubber
(d) Melamine formaldehyde resin
Which of the following plastics is used for making electric switches ?
(a) teflon (b) melamine (c) PET (d) bakelite