Determine the empirical formula of an oxide of sulphur containing 60% of oxygen 

[S = 32, O = 16 ]

The scientist that performed the experiment on discharged tubes that led to the discovery of the cathode rays as a sub-atomic particle is 

In the treatment of water for municipal supply, chlorine is used to 

The combustion of candle under limited supply of air forms

A major effect of oil pollution in coastal water is