Lessons

Eamcet Chemistry
1st Year : Unit 1.4 (Basics & Concepts) - Stoichiometric Calculations

6 / 30

Q.

200 mL of pure and dry oxygen is subjected to silent electrical discharge. The volume of ozonised oxygen obtained is 190 mL. What is the percent conversion of oxygen to ozone?

View Answer

Correct choice: D

Explanation:

3O2 → 2O3
3 vol 2 vol
200 ml 0 mL
(200-3x) mL 2x mL
Ozonised oxygen = O2 remaining + O3 obtained = 190 mL = (200 – 3x + 2x) ml
Solving, x = 10 mL
volume of O2 remaining = 200 – 30 = 170 mL
volume of O2 consumed = 30 mL
If 200 mL O2 is taken = 30 mL is converted
If 100 mL O2 is taken = ?
The percentage conversion of oxygen = × 30 = 15%
6 / 30