Font size
WorksheetsAntiseptic, disinfectants and desensitizing agent
Total questions: 13
Worksheet time: 13mins
Name the agent that is apply on living tissues to eliminate/ destroy microorganism
(a)
Antiseptic and disinfectant may work by the following process
Oxidation of bacterial protoplasm
Denaturation of bacterial proteins
.
competition with essential substrates for the important enzymes in the bacterial cell
All the above
Chloroxylenol is classified under which
Phenol and related compounds
Halophors
Aldehydes
Acids
Name the agent that act as an oxidizing agent and an astringent. It is in dark purple crystals and water soluble.
Formaldehyde
Resorcinol
Silver nitrate
Potassium permanganate
Which is not true about glutaraldehyde
act by denaturing the proteins
protoplasmic poison
less efficient than formalin
needs to be activated by alkalinization of the solution
Disinfectant are except
agents that destroy or kill the growth of the microorganism
Kill’s the vegetative bacteria
Applied in the form of mouthwashes and gargles
use on an inanimate object
What is the chemical name of Dettol
Chloroxylenol
Hexachlorophene
Cholorocresol
Phenol
Identify the criterial for ideal germicides
chemically stable and have rapid action
not to be absorbed into systemic circulation
interfere and delay wound healing activity
promotes allergy
Which statements is wrong about ethyl alcohol
An effective antiseptic and cleansing agent at 40-90%concentration
Low concentrations of it enhance the antiseptic activity of iodine and chlorhexidine when used as solvent.
The rapidity of action increases with the concentration up to 90%.
Used as an antiseptic on skin before giving injections & surgical procedures
What is a surfactant?
A molecule that does not adsorb at surfaces
A substance that prevents bubble formation
A molecule that reduces surface tension of a liquid
A substance that is always water soluble
Which one of the following is not cationic surfactant
Cetavlon
Savlon
Sodium lauryl sulphate
Benzalkonium chloride.
Which is not true about anionic surfactants
effective for gram negative bacteria
dissociates in aqueous solutions to form a large and complex anion which lowers the surface tension
microorganisms are enmeshed in the lather and washed away on rinsing
cause drying of the skin.
Which of the following desensitizing agents works by depolarizing the nerve of the pulp?
Fluoride
Calcium sodium phosphosilicates
Potassium nitrate
Resin agents
