Chemical Engineering Mcqs

Condensation polymerisation of caprolactam is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6?

• (A)  -20 to 25
• (B)  50 to 75
• (C)  100 to 150
• (D)  250-280

Answer

Submitted By :Ali Uppal

Scouring is a finishing operation during the manufacture of fibre, which aims at ______________ of fibres?

• (A)  Improving the stretchability
• (B)  Dyeing/colouring
• (C)  Detergent solution washing
• (D)  Glycol soaking

Answer

Submitted By :Ali Uppal

In condensation polymerisation as compared to addition polymerisation____________________?

• (A)  The monomers are unsaturated compounds
• (B)  No co-product is lost
• (C)  The monomers contain two functional groups
• (D)  Generally only one monomer is involved

Answer

Submitted By :Ali Uppal

Polyvinyl acetate is never used for making_________________?

• (A)  Moulded articles
• (B)  Fibres
• (C)  Adhesives
• (D)  All

Answer

Submitted By :Ali Uppal

Plexiglass (also called Lucite) because of its high optical transparency is used for making lenses. It is chemically_________________?

• (A)  Polymethyl methacrylate (PMMA)
• (B)  Polytetrafluroethylene (PTFE)
• (C)  Polycarbonates
• (D)  Phenolic resins

Answer

Submitted By :Ali Uppal

Rexine (also called artificial leather), which is used for making table cover, automobile seat cover, shoes etc. is made by coating thick cloth with molten_______________?

• (A)  Teflon
• (B)  Bakelite
• (C)  SBR
• (D)  PVC

Answer

Submitted By :Ali Uppal

Commercial production of polypropylene employs _____________ polymerisation?

• (A)  Emulsion
• (B)  Suspension
• (C)  Solution
• (D)  Bulk

Answer

Submitted By :Ali Uppal

Nylon-66 is a polyamide of __________________?

• (A)  Hexamethylene diamine and adipic acid
• (B)  Adipic acid and methyl amine
• (C)  Vinyl chloride and formaldehyde
• (D)  None of these

Answer

Submitted By :Ali Uppal

The only natural thermoplastic resin, which is a product of animal life is ____________________?

• (A)  Rosin
• (B)  Shellac
• (C)  Amber
• (D)  Copal

Answer

Submitted By :Ali Uppal

Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is __________________?

• (A)  Nylon-66
• (B)  Teflon
• (C)  Polyester
• (D)  Bakelite

Answer

Submitted By :Ali Uppal