Question: Ion exchange resins are made of____________________?

• 1. Lucite
• 2. Sulphonated Bakelite
• 3. Polystyrene
• 4. Teflon

Question: Alkyd resin is a/an___________________?

• 1. Polyamide
• 2. Polyester
• 3. Polyolefin
• 4. Addition polymer

Question: The physical state in which polymers exist is___________________?

• 1. Melts & rubber like state
• 2. Amorphous glassy state
• 3. Partially crystalline state
• 4. All A, B and C

Question: Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m2. Which of the following polymers has the maximum film elongation (of the order of 100%) ?

• 1. Water impermeable cellophane
• 2. Polythene
• 3. Cellulose acetate
• 4. Teflon

Question: Polycaprolactam (Nylon – 6) is produced by the condensation polymerisation of caprolactam at 240-280°C in which the conversion of caprolactam is about ______________ percent?

• 1. 50
• 2. 75
• 3. 90
• 4. 99

Question: Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is_______________________?

• 1. Ni
• 2. V2O5
• 3. Fe
• 4. Aluminium triethyl combined with titanium tetrachloride

Question: Plastic articles are normally produced by _____________ moulding?

• 1. Green sand
• 2. Injection
• 3. Shell
• 4. Dry sand

Question: Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about ______________ ° C?

• 1. -20
• 2. 50
• 3. 250
• 4. 500

Question: Diphenylamine is added to rubber to_________________?

• 1. Vulcanise it
• 2. Protect it from deterioration on exposure to air
• 3. Make it non-inflammable
• 4. Make it thermosetting

Question: Plastic tubes & pipes are generally made by ______________ moulding?

• 1. Injection
• 2. Transfer
• 3. Extrusion
• 4. Compression