Answer :

the food coming from stomach is made to be alkaline ...
reason;
the pancreas secretions and intestinal glands only work on the alkaline solution...
 so food coming from stomach is made alkaline so that it can be easily react with the intestinal juice for digestion.....
Pulkit
It has to be made alkaline in order to avoid acid reflux. It is the condition where food and stomach acid push back into esophagus which may cause burning pain in the lower chest accompanied by other serious symptoms.