How can i know whether solution is acidic or not and then what type of acid?

Question:

Wet chemical analysis

Until the 1970s, the ions and functional groups of the unknown compounds in a solution were determined by adding reagents that gave identifiable results depending on what else was present. The best known of these is probably litmus paper, which turns blue under basic conditions and red in acid, because the fungus impregnated in the paper changes color depending on pH.

Answer and Explanation: 1