Question

why is bread taste sweet after it is chewed for a while?​

Answer 1

Answer:

The bread tastes sweet after chewing it for a long time because of the digestion of polysaccharides into disaccharide maltose with the help of salivary amylase which is secreted along with the saliva. ... Maltose is formed by 2 molecules of glucose and thus is sweet in taste.

Answer 2

Here's what you had asked for:

Saliva breaks down complex food into simpler substances or Glucose.

Glucose is sweet, so when we chew bread it tastes sweet after some time.