Polymer Technolgy MCQs

Question 1

Pick out the wrong statement regarding the solubility characteristics of high polymers.

Accepted Answer

High molecul ar weight polymers on dissolving gives solution of very low viscosity

Answer

Greater the degree of cross-linking in the polymer, lesser is its solubility

Answer

Polymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble in aromatic solvents

Answer

Swelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent

Question 2

Rain coats are made of

Accepted Answer

PVC

Answer

Neoprene

Answer

Polyurathane

Answer

SBR

Question 3

Rayon is a __________ fibre.

Accepted Answer

Cellulosic

Answer

Polyamide

Answer

Polyester

Answer

Natural

Question 4

Phosphates (e.g., triceresyl, tributyl, tetrabutyl, tripheyl etc.) are added to polymers to act as

Accepted Answer

Plasticisers

Answer

Hardeners

Answer

Anti-shrinkage agents

Answer

Transparency improver

Question 5

In condensation polymerisation as compared to addition polymerisation

Accepted Answer

The monomers contain two functional groups

Answer

The monomers are unsaturated compounds

Answer

No co-product is lost

Answer

Generally only one monomer is involved

Question 6

Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800?

Accepted Answer

50000

Answer

51600

Answer

49200

Answer

50800

Question 7

Terylene is a/an

Accepted Answer

None of these

Answer

Addition polymer

Answer

Poly amide

Answer

Homopolymer

Question 8

In nylon-6, the number 6 represents the total number of

Accepted Answer

Carbon atoms in the linear polymer chain

Answer

Carbon atoms in the ring

Answer

Nitrogen atoms in the ring

Answer

Hydrogen atoms in the ring

Question 9

Alkyd resin e.g., glyptal resin formed by phthalic anhydride and glycerene is not used

Accepted Answer

For fibre making

Answer

For surface coating of automobiles & air crafts

Answer

As plasticiser for PVC & nitrocellulose

Answer

For film forming materials