Chemical Engineering Mcqs

In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher ___________________?

• (A)  Densities
• (B)  Melting point
• (C)  Tensile strength
• (D)  Hardness, rigidity & brittleness

Answer

Submitted By :Ali Uppal

Catalyst used in the production of high density polythene by low pressure Ziegler process is ____________________?

• (A)  Aluminium triethyl activated with TiCl4
• (B)  Platinum
• (C)  Molybdenum
• (D)  Nickel

Answer

Submitted By :Ali Uppal

Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is__________________?

• (A)  7 kgf/cm2 and 70 °C
• (B)  1000 kgf/cm2 and 100°C
• (C)  7 kgf/cm2 and 700°C
• (D)  1 kgf/cm2 (gage) and 70°C

Answer

Submitted By :Ali Uppal

Elastomers are__________________?

• (A)  Thermosetting material
• (B)  Exemplified by protein derivatives
• (C)  Having high flexural strength
• (D)  Having very high tensile strength and heat resistance

Answer

Submitted By :Ali Uppal

The generic chemical name for the class of polymers which are commercially known as nylons is______________________?

• (A)  Polyolefins
• (B)  Polyamide
• (C)  Polyacrylate
• (D)  Polyurethane

Answer

Submitted By :Ali Uppal

In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is________________?

• (A)  Terylene
• (B)  Polybutadiene
• (C)  PVC
• (D)  Polypropylene

Answer

Submitted By :Ali Uppal

In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer ?

• (A)  PTFE
• (B)  Buna-S
• (C)  PMMA
• (D)  Polycaprolactam

Answer

Submitted By :Ali Uppal

Nylon-66 is manufactured from ____________________?

• (A)  Adipic acid and Hexamethylene diamine
• (B)  Caprolactam
• (C)  Maleic anhydride and Hexamethylene diamine
• (D)  Dimethyl terephthalate (DMT) and ethylene glycol

Answer

Submitted By :Ali Uppal

Poly-tetra-fluoro ethylene (PTFE) is known as_________________?

• (A)  Dacron
• (B)  Teflon
• (C)  Bakelite
• (D)  Celluloid

Answer

Submitted By :Ali Uppal

Density of low density polythene is about ____________ gm/c.c?

• (A)  0.38
• (B)  0.56
• (C)  0.81
• (D)  0.91

Answer

Submitted By :Ali Uppal