Question

A student adds a few drops of the universal indicator to a solution of dilute hydrochloric acid in the way shown here. He would observe that the colour of the solution changes form colourless to :

(1) red
(2) yellow
(3) violet
(4) green

Answer 1

Universal indicator is used to test the pH of unknown solutions, acids give red color with universal indicator. Hence when the universal indicator is dropped in hydrochloric acid, it gives red color.

Hence, the correct answer is option 1.