Answer to Question 1
ANS: A
Manual wiping with a chemical-impregnated cloth or sponge, soaking by total immersion, and processing by flush through machinery are three methods of disinfection. The method employed depends on the desired resultant level of disinfection.
Answer to Question 2
ANS: C
Quaternary compounds alter the cell membrane and cause protoplasm leakage in some microorganisms, primarily vegetative bacteria. These compounds possess detergent properties and are used to sanitize noncritical surfaces.
Energy flow and chemical recycling in ecosystems.
11.2 The chemical structure of mescaline, derived from the peyote cactus
The argon-argon method is useful for dating volcanic sediments.
HP-01 wrist instrument, 1977
How to get the derivative of x/(2-sqrt(x)) using delta method
Summary of Chemical Digestion