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Physical and Chemical Agents - Medical Science

Q1:

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?

A 1

B 5

C 10

D 50

ANS:C - 10

Ist dilution factor /second final dilution factor.

=> 1/600/1/60 = 600/60 = 10.
So, the answer is 10.