The gas 'A' is having very low reactivity reaches to stratosphere. It is non-toxic and non-flammable but dissociated by UV-radiations in stratosphere. The intermediates formed initially from the gas 'A' are:

Option 1 - <math> <mrow> <mover> <mrow> <mi>C</mi> </mrow> <mrow> <mo>•</mo> </mrow> </mover> <msub> <mrow> <mi>H</mi> </mrow> <mrow> <mn>3</mn> </mrow> </msub> <mo>+</mo> <mover> <mrow> <mi>C</mi> </mrow> <mrow> <mo>•</mo> </mrow> </mover> <msub> <mrow> <mi>F</mi> </mrow> <mrow> <mn>2</mn> </mrow> </msub> <mi>C</mi> <mi>l</mi> </mrow> </math>

Option 2 - <math> <mrow> <mi>C</mi> <mi>l</mi> <mover> <mrow> <mi>O</mi> </mrow> <mrow> <mo>•</mo> </mrow> </mover> <mo>+</mo> <mover> <mrow> <mi>C</mi> </mrow> <mrow> <mo>•</mo> </mrow> </mover> <msub> <mrow> <mi>F</mi> </mrow> <mrow> <mn>2</mn> </mrow> </msub> <mi>C</mi> <mi>l</mi> </mrow> </math>

Option 3 - <math> <mrow> <mi>C</mi> <mi>l</mi> <mover> <mrow> <mi>O</mi> </mrow> <mrow> <mo>•</mo> </mrow> </mover> <mo>+</mo> <mover> <mrow> <mi>C</mi> </mrow> <mrow> <mo>•</mo> </mrow> </mover> <msub> <mrow> <mi>H</mi> </mrow> <mrow> <mn>3</mn> </mrow> </msub> </mrow> </math>

Option 4 - <math> <mrow> <mover> <mrow> <mi>C</mi> </mrow> <mrow> <mo>•</mo> </mrow> </mover> <mi>l</mi> <mo>+</mo> <mover> <mrow> <mi>C</mi> </mrow> <mrow> <mo>•</mo> </mrow> </mover> <msub> <mrow> <mi>F</mi> </mrow> <mrow> <mn>2</mn> </mrow> </msub> <mi>C</mi> <mi>l</mi> </mrow> </math>

2 Views|Posted 7 months ago

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Vishal Baghel | Contributor-Level 10

7 months ago

Correct Option - 4

Detailed Solution:

In stratosphere CFC get broker down by powerful UV/radiation releasing Cl^·

$C F_{2} C l_{2} (g) \overset{U V}{\to} C l^{•} (g) + C^{•} F_{2} C l (g)$

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Chemistry Ncert Solutions Class 12th 2023

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