How will you prepare the following
(a) Buna-S (b) Bakelite (c) Teflon (d) PVC (e) Nylon 6,6 (f) Polystyrene
Give one use of in each case.

Give one use of nylon-6,10

Mention two important uses of each of the following : (i) Bakelite (ii) Nylon 6

Write two uses of each of the following polymers. "(i) Polypropylene (ii) PVC (iii) Nylon - 66"

Give one use for each of the following inert gases : (a) argon " " (b) helium . (c) neon " " (d) radon (e) krypton " " (f) xenon.

Which one of the following is not a polyamide polymers: (a) Nylon-6,6 (b) Nylon-6,10 ( c) Glylptal (d) Dacron

Which one of the following cannot be prepared from B_(2)H_(6) ?

Consider a coaxial system of two thin convex lenses of focal length f each separated by a distance d. Draw ray diagrams for image formation corresponding to an object at infinity placed on the principal axis in the following cases: (a) d lt f ,(b) d=f , (c ) f lt d lt 2f , (d) d=2f , and (e) d gt 2f . Indicate the nature of the combination (concave, convex or plane) in each case.

How many of these polymers are condensation polymers? Nylonn - 6, 6, Dacron, Bakelite, Teflon, Buna - N, Nylon - 6, Glyptal, Polythene

Arrange the following polymers in increasing order of their intermolecular forces : (i) Nylon 6 6, Buna-S, Polythene. (ii) Nylon 6, Neoprene, Polyvinyl chloride.