Question

dB is a standard abbreviation used for the quantitative expression of ________

• A. A particular pollutant
• B. The dominant Bacillus in a culture
• C. A certain pesticide
• D. The density of bacteria in a medium

Answer 1

The correct option is A A particular pollutant

dB is a standard abbreviation used for the Decibel unit which is used for the quantitative expression of noise level. A noise level of more than 80 dB can damage the human ears. The noise level which is safe has been declared as 45 dB by WHO

So, the correct answer is 'A particular pollutant'