Related Questions

Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.
A Organic peroxides
B Sulphuric acid
C Hydroflouric acid
D None of these
Removal of free radicals occur by
A Antioxidant
B Superoxide dismutase
C Transferrin
D Calcium
E Nitric Oxide
Free radicals
A May arise by absorption of radiant energy
B Antioxidants block free radical formation
C May cause peroxidation of lipids within plasma membrane
D Are not a byproduct of metabolism
E Can only form in the presence of oxygen
Free radicals are generated
A During inflammation
B By enzymatic metabolism of drugs
C During normal metabolic processes
D By glutathione
E By ceruloplasmin
Free radicals are formed in the body
A By absorption of X-rays
B During metabolism
C By the formation of reactive oxygen species
D By superoxide dismutases
E By vitamin E
Systems that operate to inactivate free radicals are
A Glutathione peroxidase
B Superoxide dismutase
C Vitamin C
D Hydrogen peroxide
E Myeloperoxidase
The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by
A Biological oxygen pond
B Aerated lagoons
C Trickling filters
D Gravity separator having oil skimming devices
If 1/2 of the air in a tank is removed with each stroke of a vacuum pump, what fraction of the original amount of air has been removed after four strokes ?
A 15/16
B 7/8
C 1/4
D 1/8
The average of five numbers is 25. After one if the numbers is removed, the average of the remaining is 31. What number has been removed?
A 7
B 6
C 4
D 1
If 1/2 of the air in a tank is removed with each stroke of a vacuum pump,what fraction of the original amount of air has been removed after 4 strokes?
A 15/16
B 7/8
C 1/4
D 1/8

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