Can whole bulgur grains (non ground), cooked for say 5 minutes become chametz? Are they allowed on Passover? If not why?

Shalom, Thank you for your question. Bulgur is made from wheat – and as such, when it comes into contact with water, it can become “chametz” or leaven, which is forbidden on Passover. That being so, if your bulgur was put in water, even if for only a few minutes, it is not permitted on Passover. Blessings