Related Questions

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

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