Answer:
Corrosive
Step-by-step explanation:
Substance having pH more than 7 are known as base and which have less than 7 are acids.
Neutral materials have pH 7.
Base has bitter taste, slippery to touch and is caustic nature.
On the other hand, acid is corrosive in nature and sour to taste.
Thus, corrosive is not a property of a base.