The reaction that is not involved in the ozone layer depletion mechanism in the stratosphere is:

C F_{2} C l_{2} (g) U V ⟶ ∙ C l (g) + ∙ C F_{2} C l (g)

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C H_{4} + 2 O_{3} \to 3 C H_{2} = O + 3 H_{2} O

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

H O C l (g) h v ⟶ ∙ O H (g) + ∙ C l (g)

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C l ∙ O (g) + O (g) \to ∙ C l (g) + O_{2} (g)

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $C H_{4} + 2 O_{3} \to 3 C H_{2} = O + 3 H_{2} O$
(1) The upper stratosphere consists of a considerable amount of ozone which protects us from the harmful UV radiation coming from the sun. The main reason for depletion is CFCs.

(2) When released in the atmosphere, CFCs mix with the normal atmospheric gases and eventually reach the stratosphere. In the stratosphere, they get broken down by powerful UV radiations, releasing chlorine free radical.

$C F_{2} C l_{2} (g) U V ⟶ ∙ C l (g) + ∙ C F_{2} C l (g)$

(3) The chlorine free radical $∙ C l$ then reacts with stratospheric ozone to form chlorine monoxide redicals $C l ∙ O$ and molecular $O_{2}$ .

$C l + O_{3} (g) \to C l ∙ O (g) + O_{2} (g)$

Reaction of $C l ∙ O$ with atomic oxygen produces $∙ C l$ radicals.

$C l ∙ O + O (g) \to ∙ C l (g) + O_{2} (g)$

So, the reaction of methane with ozone doesn't happen.

Option C is correct.

Suggest Corrections

Similar questions

What are the reactions involved for ozone layer depletion in the stratosphere?

The major cause for depletion of ozone layer in stratosphere is due to the

Join BYJU'S Learning Program