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Statement “Ozone in atmosphere is decrea...

Statement “Ozone in atmosphere is decreased by emission of chloro-fluoro-carbons like `"CCl"_(2)F_(2)` ”

A

Is true

B

Is false

C

Only in presence of `CO_2`

D

Only in absence of `CO_2`

Text Solution

Verified by Experts

The correct Answer is:
A
Freon
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":CCl"_(2) is :

Species formed first in the depletion of ozone layer by chloro fluoro carbons

1-chloro-2-propanal

A chemist while studying the properties of gaseous C_(2)Cl_(2)F_(2) , a chlorofluoro carbon refrigerant, cooled a 1.25 g sample at constant atmospheric pressure of 1.0 atm from 320 K to 290 K . During cooling, the sample volume decreased from 274 to 248 mL . Calculate Delta H and Delta U for the chlorofluoro carbon for this process. For C_(2)Cl_(2)F_(2) , C_(P) = 80.7 J mol^(-1) K^(-1) .

The depletion of ozone layer in the upper atmosphere is mainly due to the emission of :