Choose  the incorrect statement
(A) The Montreal protocol is associated with the control of emission of ozone depleting substances
(B) Methane and carbon dioxide are greenhouse gases
(C) Dobson units are used to measure oxygen content of air
(D) Use of incinerators is crucial to disposal of hospital wastes

Options

A. The Montreal protocol is associated with the control of emission of ozone depleting substances
B. Methane and carbon dioxide are greenhouse gases
C. Dobson units are used to measure oxygen  content of air
D. Use of incinerators is crucial to disposal of hospital wastes

Answer

C

Explanation

The thickness of ozone is measured in terms of Dobson Units (DU). It is 0.01 mm in thickness at STP. In stratosphere ozone gas is continuously formed by the action of ultraviolet rays on molecular oxygen & also degraded into molecular oxygen.
`O_(3)hArr O_(2)+[O]`