A. Epoxy
B. Phenol formaldehyde
C. Urea formaldehyde
D. Melamine formaldehyde
Related Mcqs:
- Cation exchange resins used in water treatment is made from _____________ resin?
A. Urea formaldehyde
B. Epoxy
C. Amino
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 A., B. & C. - Ion exchange resins are made of____________________?
A. Lucite
B. Sulphonated Bakelite
C. Polystyrene
D. Teflon - Silicone resins, which are highly water repellent and has good heat resistance cannot 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 - Thermoplastic resins usually____________________?
A. Remain hard as long as they are hot
B. Cannot be reclaimed from waste
C. Permanent setting resins
D. Less brittle than thermosetting resins - Epoxy resins (i.e., epoxide polymers) ?
A. Are made by addition polymerisation reaction only
B. Contain an epoxy group (fig bellow) 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 - Rayon is superior to cotton in making gauge for wound treatment, because rayon_____________________?
A. Is a synthetic polymer
B. Does not stick to the wound unlike cotton
C. Can absorb over 90% of its own weight of water
D. Both B. and C. - Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex ?
A. Ammonium alum
B. Potassium alum
C. Both A. & B.
D. Neither A. nor B.
