Pharmacy Practice MCQ- Disinfectants

Pharmacy Practice MCQ, in this article we will solve, Practice MCQ under subject Microbiology. Read following article for your reference.

Classification And Mode Of Action Of Disinfectants » PHARMACAREERS

What is the primary purpose of disinfectants?
- a) To kill or inhibit the growth of microorganisms
- b) To provide nutrients to microorganisms
- c) To enhance the growth of microorganisms
- d) To neutralize toxins
Which type of disinfectant works by denaturing proteins and disrupting cell membranes?
- a) Alcohols
- b) Halogens
- c) Phenolics
- d) Quaternary ammonium compounds
Which of the following is a commonly used alcohol-based disinfectant?
- a) Ethanol
- b) Chlorine
- c) Formaldehyde
- d) Iodine
What is the mode of action of halogen-based disinfectants like chlorine and iodine?
- a) Oxidizing cell components
- b) Disrupting cell membranes
- c) Inhibiting protein synthesis
- d) Denaturing nucleic acids
Which disinfectant is known for its ability to kill spores and is often used in sterilization?
- a) Hydrogen peroxide
- b) Alcohol
- c) Quaternary ammonium compounds
- d) Phenolics
What type of disinfectant is benzalkonium chloride?
- a) Halogen
- b) Alcohol
- c) Phenolic
- d) Quaternary ammonium compound
Which of the following disinfectants is effective against a wide range of microorganisms, including bacteria, viruses, and fungi?
- a) Ethanol
- b) Chlorhexidine
- c) Phenol
- d) Formaldehyde
Which disinfectant is commonly used in water treatment to kill bacteria and viruses?
- a) Alcohol
- b) Phenol
- c) Chlorine
- d) Quaternary ammonium compounds
What is the mode of action of phenolic disinfectants?
- a) Denaturing proteins and disrupting cell membranes
- b) Oxidizing cell components
- c) Inhibiting DNA synthesis
- d) Disrupting the cell wall
Which disinfectant is most effective at killing Mycobacterium tuberculosis?
- a) Alcohol
- b) Iodine
- c) Glutaraldehyde
- d) Quaternary ammonium compounds
Which class of disinfectants works by interfering with the permeability of the cell membrane?
- a) Halogens
- b) Alcohols
- c) Phenolics
- d) Quaternary ammonium compounds
Which disinfectant is commonly used for skin antisepsis before surgeries?
- a) Chlorine
- b) Phenol
- c) Isopropanol
- d) Hydrogen peroxide
Which of the following disinfectants releases free radicals to damage microbial cells?
- a) Quaternary ammonium compounds
- b) Alcohol
- c) Hydrogen peroxide
- d) Chlorhexidine
What is a common use of aldehyde disinfectants like formaldehyde and glutaraldehyde?
- a) Disinfecting drinking water
- b) Sterilizing medical instruments
- c) Hand sanitization
- d) Surface cleaning
Which disinfectant is known for its persistent activity, making it effective for long-term disinfection?
- a) Ethanol
- b) Chlorhexidine
- c) Phenol
- d) Hydrogen peroxide
Which disinfectant class is commonly used in household cleaning products for its broad-spectrum antimicrobial activity?
- a) Alcohols
- b) Phenolics
- c) Quaternary ammonium compounds
- d) Aldehydes
What is the primary mechanism of action for alcohol-based disinfectants?
- a) Denaturing proteins
- b) Oxidizing cell components
- c) Disrupting cell walls
- d) Interfering with DNA synthesis
Which disinfectant is known for its ability to form a protective barrier on surfaces, preventing microbial growth?
- a) Chlorine
- b) Iodine
- c) Chlorhexidine
- d) Formaldehyde
Which of the following disinfectants is used in the disinfection of endoscopic equipment due to its effectiveness against a wide range of microorganisms?
- a) Ethanol
- b) Glutaraldehyde
- c) Phenol
- d) Chlorhexidine
What type of disinfectant is typically used to disinfect large areas such as hospital rooms and laboratories?
- a) Alcohol
- b) Quaternary ammonium compounds
- c) Phenolics
- d) Chlorine dioxide
Which disinfectant is effective against biofilms and used in healthcare settings to ensure thorough disinfection?
- a) Alcohol
- b) Chlorhexidine
- c) Phenol
- d) Hydrogen peroxide
What is the mode of action of chlorine dioxide disinfectants?
- a) Disrupting cell membranes
- b) Oxidizing cellular components
- c) Inhibiting protein synthesis
- d) Denaturing nucleic acids
Which disinfectant is used in the food industry to sanitize equipment and surfaces without leaving harmful residues?
- a) Quaternary ammonium compounds
- b) Chlorhexidine
- c) Ethanol
- d) Hydrogen peroxide
Which disinfectant class includes agents that are both bactericidal and virucidal, making them effective for a wide range of applications?
- a) Halogens
- b) Alcohols
- c) Phenolics
- d) Quaternary ammonium compounds
Which disinfectant is preferred for use in cleanrooms and controlled environments due to its minimal residue and rapid action?
- a) Chlorhexidine
- b) Hydrogen peroxide
- c) Phenol
- d) Quaternary ammonium compounds
What is the primary advantage of using hydrogen peroxide as a disinfectant?
- a) Low cost
- b) Residual activity
- c) Broad-spectrum activity
- d) Long contact time required
Which disinfectant is commonly used for hand sanitizers due to its rapid antimicrobial activity?
- a) Phenol
- b) Chlorhexidine
- c) Ethanol
- d) Quaternary ammonium compounds
What type of disinfectant is effective against spore-forming bacteria, making it suitable for sterilization processes?
- a) Alcohols
- b) Quaternary ammonium compounds
- c) Aldehydes
- d) Halogens
Which of the following disinfectants is often used in combination with alcohol to enhance its antimicrobial activity?
- a) Chlorine
- b) Phenol
- c) Iodine
- d) Formaldehyde
What is the primary factor to consider when selecting a disinfectant for use in pharmaceutical manufacturing?
- a) Cost
- b) Speed of action
- c) Compatibility with materials
- d) All of the above

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