dB is a standard abbreviation used for the quantitative expression of

  • Option 1)

    the density of bacteria in a medium

  • Option 2)

    a particular pollutant

  • Option 3)

    the dominant Bacillus in a culture

  • Option 4)

    a certain pesticide

 

Answers (1)

As discussed in

Noise -

Noise is undesired high level of sound. We have got used to associating loud sounds with pleasure and entertainment not realising that noise causes psychological and physiological disorders in humans.

- wherein

A brief exposure to extremely high sound level, 150 dB or more generated by take off of a jet plane or rocket, may damage ear drums thus permanently impairing hearing ability.

 

 dB is abbreviated for decimal. It's a unit of sound and hence used to measure sound pollution.


Option 1)

the density of bacteria in a medium

This solution is incorrect

Option 2)

a particular pollutant

This solution is correct

Option 3)

the dominant Bacillus in a culture

This solution is incorrect

Option 4)

a certain pesticide

This solution is incorrect

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