Question: Which of the following is an elastomer ?

• 1. Thiokol
• 2. Phenol formaldehyde
• 3. Urea formaldehyde
• 4. Polystyrene

Question: ______________ is an addition polymer ?

• 1. Nylon
• 2. Bakelite
• 3. Polythene
• 4. None of these

Question: Liners of bags are usually made of ____________________?

• 1. Polythene
• 2. PVC
• 3. Polypropylene
• 4. Polyesters

Question: Most commonly used rubber vulcanisation agent is __________________?

• 1. Sulphur
• 2. Bromine
• 3. Platinum
• 4. Alumina

Question: Thermocol (expanded polystyrene) is not used for __________________?

• 1. Low temperature thermal insulation as in refrigerator and air conditioners
• 2. Acoustic control and ceiling for building
• 3. High temperature thermal insulation in furnaces
• 4. Packing of delicate electronic gadgets

Question: Which of the following is not a polymer of two monomers ?

• 1. Teflon
• 2. Bakelite
• 3. SBR
• 4. None of these

Question: Buna-S is also called____________________?

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

Question: Pick out the wrong statement ?

• 1. Cold SBR is superior as compared to hot SBR
• 2. Polymerisation temperature can modify the properties of SBR
• 3. Production of cold SBR employs lower pressure as compared to that of hot SBR
• 4. None of these

Question: Pick out the wrong statement ?

• 1. Polymeric fibres are never produced by addition polymerisation
• 2. Property of tackiness is exhibited by uncured rubber
• 3. Sharp melting point is not observed in thermoplastic polymers
• 4. Polythene generally has an excellent resistance to ultra violet rays

Question: Pick out the wrong statement ?

• 1. Addition polymers are generally formed by chain growth polymerisation
• 2. Condensation polymers are generally formed by step growth polymerisation
• 3. Teflon is formed by step growth polymerisation
• 4. Bakelite is formed by step growth polymerisation