About microwavable rice pouches. Is it fully cooked when microwaved?

I usually don't eat a whole pouch so I put the rest in the fridge.Sometimes I eat the rice cold and it has a chewy hard texture to it. Has the rice become somehow raw again or is it hard from being in the fridge. I am worried that I may be eating parboiled rice which has more calories than cooked. I do not want to be eating more than I intended.