Ion exchange resins are made of

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

A

Urea formaldehyde

B

Epoxy

C

Amino

D

Phenolic

নিচের কোন আয়নটি o2- এর সম-ইলেকট্রন বিশিষ্ট? (Which ion of the following has the same number of electrons as an o2- ion?)

A

K+

B

Mg2+

C

Cl-

D

S2-

One of the methods of purification of leach liquor is ion exchange, which involves

A

Exchange between two liquid phases

B

Exchange between a gaseous phase and a liquid phase

C

Exchange between a liquid phase and an organic resin phase

D

Exchange between a solid phase and a gas phase

Ion exchange process is similar to

A

Absorption

B

Adsorption

C

Extraction

D

Leaching

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

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

A

Not soluble in water

B

Soluble in spirit

C

Used in varnishes

D

Left behind on evaporation of oil

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

Ion exchange resins are made of

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