Geography PYQ 452 of 587 · Landforms, Islands, Straits, Canals & Atmosphere · Atmosphere

Ozone layer refers to –

  1. AThe atmospheric condition of Antarctica
  2. BModern invention done on the planet Saturn
  3. CThe layer about 10-20 km. below the surface of Earth
  4. DThe layer of atmosphere of 15-20 km. above the surface of Earth

38th B.P.S.C. (Pre) 1992

Show answer and explanation

BPSC treated this question as having no correct option (cancelled).

Explanation

The ozone layer is found in the lower part of the stratosphere at a height of about 15–35 km. Although ozone can be present from about 10 km to 50 km, as a distinct “layer” ozone is mainly found at 15–35 km height. The ozone layer, which is extremely essential for human life, absorbs ultraviolet radiation coming from the Sun and prevents it from reaching the Earth. These rays increase the risk of skin cancer.

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