Statement I : Poisonous gases can be diluted by the process of diffusionStatement II : Ansil's alarm works on the principle of Graham law

Poisonous gases when mixed with non-poisonous gases by the process of diffusion their concentration decreases and level of toxicity decreases.Ansil's alarm is used to detect presence of Marsh gas in deep mines  which works on diffusion.( To prevent exploison as methane is having high enthlpy of combustion).