Question

When `20ml` of mixture of `O_(2)` and `O_(3)` is heated the volume becomes `29ml` and disappears in alkaline pyragallol solution. What is the volume precent of `O_(2)` in the originl mixture ? .
A. 0.9
B. 0.1
C. 0.18
D. 0.02

Answer 1

Correct Answer - B
`underset(a)(O_(3)) to underset(a+9)(O_(2))`
POAc on 0
3a=2(a+9)
a=18 ml
% of `O_(2)=2/20xx100=10%`