How will you find pH of lemon juice?

(a) Take about 5mL of the given sample of lemon juice in a test tube.

(b) Dip a strip of the universal pH paper in the tube.

(c) Take out the strip and note its colour. It will acquire a orange red colour.

(d) On comparison with pH paper chart, the pH of the solution falls in the range between 2 and 3.