Orange chunk in stool..powdery on examination..but don't remember eating anything orange.? i had disprin yestrday.can blood present like this in stool?

Doubt it, but...: The amount, color, frequency of stool varies with foods, speed of emptying of the GI tract, medications ; supplements ingested, gut flora (unique for each individual), additives (like blood), subtractions (like absent bile), infection, inflammation, ; other factors. You may be describing steatorrhea--due to maldigestion, pancreatic insufficiency, ingestion of olestra or orlistat, high fat intake.