Which of the following is an air pollutant?

The volume in cm\(^3\) of a 0.12 moldm\(^{-3}\) HCl required to completely neutralize a 20cm\(^3\) of 0.20 moldm\(^{-3}\) of NaOH is 

Fog is a colloid in which

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