Two liters air formed 1915 ml of ozonized air when passed through Brodio's apparatus. The volume of ozone formed is :

85 ml

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170 ml

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225 ml

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42.5 ml

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Solution

The correct option is A 170 ml
Ozonolisis reaction is given as: $3 O_{2} ⇌ 2 O_{3}$
There is a reduction of 1 volume. When reduction in volume is 1, volume of $O_{3}$ is 2
Volume of air $= 2000 m l$
Reduction in volume $= 2000 - 1915 = 85 m l$
When reduction is 1 volume, volume of $O_{3} = 2$
When reduction is 85 ml, volume of $O_{3}$ formed $= 85 \times 2 = 170 m l$

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