<prompt> Constituents of black gun powder is all EXCEPT:CharcoalKNOBLead peroxideSulphur  <response>: C i.e. Lead Peroxide Smokeless gun powder is composed of nitrocellulose nitroglycerineQ. Smoke producing black gun powder contains PCS i.e. potassium nitrate charcoal and sulfurQ. It is described as FG, FFG, FFFG depending on the fineness Fsize of grain G. 