Home⇒ Medical Science⇒ Microbiology⇒ Physical and chemical agents
| 1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
| 2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
| Q1 ⇒ Which of the following is best used for long term storage of microbial samples when carried out properly? Storage in a freezer at ultra low temperatures (-70°C) [other wrong options] [Discuss in forum] |
| Q2 ⇒ Which disinfectant was the most effective against Salmonella"? Merthiolate [other wrong options] [Discuss in forum] |
| Q3 ⇒ A(n)____is used to prevent infection by killing or inhibiting pathogen growth on animal tissues. antiseptic [other wrong options] [Discuss in forum] |
| Q4 ⇒ Which of the following material is sterilized by heating at 160°C in a hot air oven for one hour? All of these [other wrong options] [Discuss in forum] |
| Q5 ⇒ Which of the following material is sterilized by use of red heat? Inoculating wires and loops [other wrong options] [Discuss in forum] |
| Q6 ⇒ Which of the following methods will not sterilize? 100°C boiling water for 30 minutes [other wrong options] [Discuss in forum] |
| Q7 ⇒ Which of the following substances can sterilize? Ethylene oxide [other wrong options] [Discuss in forum] |
| Q8 ⇒ Which of the following skin disinfectant(s) is/are most frequently used? Both (a) and (b) [other wrong options] [Discuss in forum] |
| Q9 ⇒ If a 1:600 dilution of a test compound kills a standard population of Staphylococcus aureus in 10 minutes but not 5 minutes while a 1:60 dilution of phenol kills the population in the same time, what is the phenol coefficient of the test compound? 10 [other wrong options] [Discuss in forum] |
| Q10 ⇒ Which of the following is a limitation of the autoclave? It will destroy heat labile materials [other wrong options] [Discuss in forum] |
| Q11 ⇒ Sweet and salty foods frequently don't require refrigeration to prevent spoilage because they have high concentration of solutes [other wrong options] [Discuss in forum] |
| Q12 ⇒ Which is the most important surface active disinfectants? Cationic compounds [other wrong options] [Discuss in forum] |
| Q13 ⇒ Bactericidal concentration of phenol is 0.01 [other wrong options] [Discuss in forum] |
| Q14 ⇒ Ethylene oxide is used to destroy or kill which of the following microbes? All of these [other wrong options] [Discuss in forum] |
| Q15 ⇒ Which of the following is sterilized with the help of glutaraldehyde? All of these [other wrong options] [Discuss in forum] |
| Q16 ⇒ The time required to kill 90% of the microorganisms in a sample at a specific temperature is the D value [other wrong options] [Discuss in forum] |
| Q17 ⇒ Which of the following does not kill endospores? Pasteurization [other wrong options] [Discuss in forum] |
| Q18 ⇒ Media containing spores and thermolabile constituents are sterilized by UV radiation [other wrong options] [Discuss in forum] |
| Q19 ⇒ The organisms retained in the fluids filtered by Seitz filter is None of these [other wrong options] [Discuss in forum] |
| Q20 ⇒ Steam exposure of a material at 100°C for 20 minutes for three consecutive days is known as tyndallization [other wrong options] [Discuss in forum] |
| Or |