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The average thickness of ozone layer in stratosphere is about _______________ dobson unit (DU)?

August 29, 2021March 11, 2019 by admin

The average thickness of ozone layer in stratosphere is about _______________ dobson unit (DU)?

A. 20
B. 230
C. 750
D. 1500

Categories Chemical Environmental Engineering

Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about _______________ decibels?

CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing ________________ molecules of ozone?

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