Left behind on evaporation of oil

Resins are - Bissoy

Epoxy resins (i.e., epoxide polymers)

A

Are made by addition polymerisation reaction only

B

Contain an epoxy group ( ##### ) at the ends of the polymer

C

Are cross-linked polymers only

D

Use emulsion polymerisation methods

Ion exchange resins are made of

A

Lucite

B

Sulphonated bakelite

C

Polystyrene

D

Teflon

Thermosetting resins/polymers as compared to thermoplastic ones are

A

Soluble in all organic solvents

B

More brittle

C

Formed by addition polymerisation only

D

Easily reshaped & reused

Silicone resins, which are highly water repellant and has good heat resistance can not be used

A

As room temperature adhesive

B

As grease & lubricant

C

Hydraulic fluid for heat transfer

D

Resin for lamination

Thermosetting resins are those polymers, which

A

Do not increase in plasticity with rise in temperature

B

Allow slip to occur between molecules

C

Do not take on a permanent set

D

None of these

Thermoplastic resins are those polymers, which

A

Has decreased plasticity at increasing temperature

B

Can not be moulded

C

Easily deform under pressure at high temperature

D

None of these

Cation exchange resins used in water treatment is made from __________ resin.

A

Urea formaldehyde

B

Epoxy

C

Amino

D

Phenolic

__________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine.

A

Epoxy

B

Amino

C

Alkyd

D

Phenolic

Amino resins are used in paper treatment to improve its

A

Wet tear and bursting strength

B

Folding endurance

C

Wet rub resistance

D

All of the above

Thermoplastic resins usually

A

Remain hard as long as they are hot

B

Can not be reclaimed from waste

C

Permanent setting resins

D

Less brittle than thermosetting resins

Resins are

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