Answer the following question
One substance is slippery to touch and bitter in taste, another substance is sour in taste. If you add both, which substances will form ?

Explanation

The substance which is slippery to touch and bitter in taste is a base.
The substance which is sour in taste is an acid.
If we add both acid and base, neutralisation reaction takes place. In the reaction salt and water will form :
Acid + Base `rarr` Salt + Water