Polymer Technology

41. Bakelite (phenol-formaldehyde) resin cannot be used as

1. Decorative paint
2. Decorative laminates
3. Electrical insulation
4. Glass reinforced plastics

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42. Bakelite is a/an

1. Addition polymer
2. Elastomer
3. Thermoplastic
4. None of these

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43. Benzoyl chloride is not used as a catalyst in the manufacture of

1. Polystyrene
2. Polyvinyl acetate
3. Polypropylene
4. Polyvinyl chloride-co-vinyl acetate

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44. Branched chain polymers compared to linear polymers have higher

1. Density
2. Tensile strength
3. Melting point
4. Degree of irregularity in atomic packing

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45. Branched chair polymers as compared to linear polymers have

1. Higher melting point
2. Higher tensile strength
3. Lower density
4. None of these

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46. Bristles of tooth brushes are made of

1. Nylon-6
2. Nylon-66
3. Polystyrene
4. PVC

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47. Buna-N is also called

1. Butyl rubber
2. Nitrile rubber
3. Neoprene
4. Thiokol

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48. Buna-S is a _________ material.

1. Fibrous
2. Plastic
3. Resinous
4. Rubbery

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49. Buna-S is also called

1. Polyurethane
2. SBR
3. Teflon
4. Bakelite

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50. Buna-S is also known as

1. Teflon
2. PTFE
3. SBR
4. Polycrylates

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