The molecular weight obtained by light scattering is

• Number average molecular weight

• Weight average molecular weight

• Viscosity average molecular weight

• Sedimentation average molecular weight

Which of the following is a biopolymer?

• Glucose

• Nylon

• Polyethylene

• Cellulose

The number average molecular weight can be determined by

• End group analysis

• Light scattering

• Vapour phase osmometry

• Cryoscopy

Which of the following reaction is NOT accompanied by elimination of a byproduct molecule?

• addition polymerization

• condensation polymerization

• both of the mentioned

• none of the mentioned

Proteins are composed of what smaller subunits?

• amino acids
• nucleic acids
• fatty acids
• nucleotides

Tags

NGSS.HS-LS1-1

Which polymers occur naturally?

• Starch and Nylon

• Starch and Cellulose

• Proteins and Nylon

• Proteins and PVC

Once formed, it can be heated and reformed over and over again

• thermoset

• thermoplastic

• elastomer

• kevlar

Tags

NGSS.HS-PS3-4

Plastic bottles are fabricated by using which method

• Rotational molding

• Injection molding

• Blow molding

• Extrusion

A thermoplastic polymer will be ______________________.

below its glass transition temperature.

• soft and flexible

• rigid and brittle

• translucent

• rubbery

Which two of the following are plastic forming processes?

• Sand casting

• Rotational moulding

• Upset moulding

• Line moulding

• Blow moulding