Question

Strong acids are secreated in stomach no harm occurred why?

Answer 1

our stomach has an mucus membrane that's why

Answer 2

Hey mate!

Even though strong acids are secreted in our stomach, it gets no harm because it has a mucus coating around it which protects the stomach. So, even though the acids are produced, there is no harm. But if excess acid is produced, we will get burning in our stomach which we call acidity.

Hope it helps :)