Question

Q. 1. How can you test the presence of
an acid in any substance ?​

Answer 1

Answer:

i) Test with litmus paper: Place a drop of the given substance on a moist litmus paper. If the colour changes to red, it is an acid. ii) Test with metals: Acids react with metals to produce salt and hydrogen gas. So if the given substance gives a gas with metals and the gas burns with explosion, then it is acid.

Answer 2

Answer:

it changed its colour... blue to red