A material that speeds up a chemical reaction without chemically becoming involved is called_____________?

Related Mcqs:

1. A type of immediately occuring reaction in which antigens combine with antibodies already attached to the surface of mast cells and basophils is called_____________?

   A. Type I hypersensitivity
   B. Type II hypersensitivity
   C. Type III hypersensitivity
   D. Type IV hypersensitivity

2. S. mutans is involved in dental caries initiation Other bacteria also involved is______________?

   A. S. Sarcinus
   B. S. macae
   C. S. sanguis
   D. S. salivarius

3. Physically and chemically, the dentin is closely related to______________?

   A. Bone
   B. Acellular cementum
   C. Enamel
   D. None of the above

4. The process wherein two or more chemically different monomers, each with some desirable property, can be combined to yield specific physical properties of a polymer is known as_____________?

   A. Step-growth polymerization
   B. Addition polymerization
   C. Condensation polymerization
   D. Copolymerization

5. Residual monomer content of chemically activated resins is______________?

   A. 0.2% to 0.5%
   B. 2% to 5%
   C. 0.3% to 0.5%
   D. 2% to 5%

6. Drug chemically related to penicillins is_____________?

   A. Tetracycline
   B. Sulphonamide
   C. Cephalosporin
   D. Lincemycin

7. Which one of the following impression materials is elastic, sets by a chemical reaction and is catalyzed by chloroplatinic acid_______________?

   A. Condensation silicone
   B. Polyether
   C. Polysulfide
   D. Poly vinyl siloxane

8. Impression material that Do NOT harden by chemical reaction_______________?

   A. Zinc oxide eugenol
   B. Impression compound
   C. Alginate
   D. Plaster of paris

9. Alginate impression material is similar to Agar-agar impression material in the following respect________________?

   A. Gelation increase in both on increase in temperature
   B. Mixing time is increased to reduce the setting time
   C. Deformation during removal of impression occurs due to distortion of gel fibers
   D. Both can be re-used for fresh impressions

10. The process of formation of solid mass in circulation from the constituents of normal flowing blood is called_____________?

    A. Clot formation
    B. Thrombosis
    C. Embolism
    D. Infarction