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

Ion exchange resins are made of

A

Lucite

B

Sulphonated bakelite

C

Polystyrene

D

Teflon

Zeolite used in water softening process (cation exchange) is regenerated by washing with

A

Brine

B

Chloramines

C

Sodium bisulphite

D

Liquid chlorines

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

A

For surface coating of automobiles & air crafts

B

For fibre making

C

As plasticiser for PVC & nitrocellulose

D

For film forming materials

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

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

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

A

Epoxy

B

Amino

C

Alkyd

D

Phenolic

During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.

A

Filtration

B

Digestion

C

Sedimentation

D

Both B and C

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

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

Resins are

A

Not soluble in water

B

Soluble in spirit

C

Used in varnishes

D

Left behind on evaporation of oil

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

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