Q42 / 200 · NEET 2023 (All India) · Botany

The thickness of ozone in a column of air in the atmosphere is measured in terms of:

  • A
    Kilobase
  • Correct answer
    B
    Dobson units
  • C
    Decibels
  • D
    Decameter

Solution

Most atmospheric ozone is concentrated in a layer in the stratosphere.

The Dobson Unit is a way to describe how much ozone there would be in the column if it were all squeezed into a single layer. The average amount of ozone in the atmosphere is roughly 300 Dobson Units, equivalent to a layer 3 millimetres (0.12 inches) thick.

Hence, the correct answer is option: 'B'.

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