Question

1.What is an acid? Give any two tests for an acid.

Answer 1

Answer:

1) An acid is a molecule or ion capable of donating a proton (hydrogen ion H+) (a Brønsted–Lowry acid), or, alternatively, capable of forming a covalent bond with an electron pair (a Lewis acid). ... A lower pH means a higher acidity, and thus a higher concentration of positive hydrogen ions in the solution.

#Another way to test liquids is to use Litmus Paper. BLUE coloured Litmus turns RED in acid. Acids are dangerous chemicals because they can make things dissolve and fizz. There is another type of liquid called an alkali (or base) that is an acid opposite.

Answer 2

Answer:

a molecule which can donate a proton or accept an electron pair. A lower pH means a higher acidity.

1) litmus test

2) by titrating 

Hope it helps