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1. Which of the following chemicals is commonly used as a disinfectant in
healthcare facilities?
a) Hydrochloric acid
b) Sodium hydroxide
c) Hydrogen peroxide
d) Ethanol
Answer: c) Hydrogen peroxide
Rationale: Hydrogen peroxide is commonly used as a disinfectant in healthcare
facilities due to its broad-spectrum antimicrobial properties. It is effective
against a wide range of microorganisms, including bacteria, viruses, and
fungi.
2. Which of the following equipment is commonly used to measure the volume
of a liquid?
a) Beaker
b) Burette
c) Test tube
d) Petri dish
Answer: b) Burette
Rationale: A burette is a long, graduated glass tube with a stopcock at one end
and is specifically designed for measuring and dispensing precise volumes of
liquid. It offers higher accuracy and precision compared to other common
laboratory glassware such as beakers, test tubes, and Petri dishes.
3. When conducting a titration, which indicator is commonly used to determineÂÂ
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