Which of the following is not a property of an acid?

turns litmus paper blue

neutralize bases

corrodes active metals

turns litmus paper red

1. bitter  

2. turns litmus paper red  

3. oxygen, hydrogen, and molecules.

Explanation:

Here is your answer

a) turns blue litmus red

EXPLANATION:

It is the property of an acid that it always turns litmus paper to red. It will never turn a litmus paper to blue.

So, option (a) is not a property of an acid.

For other options:

An acid can neutralize base (not always, but this is a property of an acid)

An acid can corrode all the active metals.

HOPE IT IS USEFUL