List of top Chemistry Questions on Oxygen asked in KEAM

Which of the following pair of oxides is neutral?
An organic compound contains 37.5% C, 12.5% H and the rest oxygen. What is the empirical formula of the compound?
On passing silent electric discharge through oxygen in an ozonizer, 5.5 mol % of oxygen is converted to ozone. How many moles of O$_2$ and O$_3$ result when 35 moles of O$_2$ is originally present?