Related Questions

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

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