Multiple Choice QuestionWhich method uses the color changes of several indicators to measure the pH of a solution?Multiple choice question.litmus paperpH paperpH meterphenolphthalein

Which method uses the color changes of several indicators to measure the pH of a solution?

If litmus paper turns blue, the pH of the solution must beGroup of answer choicesacidic.above 7.0.less than 7.0.less than 4.0.

Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. Which of the following colours will be indicated by the pH paper?

A pH meter is an example of which testing method?Group of answer choicesDirection reading probeLight refraction deviceColorimetric paper

The change in colour of the moist litmus paper in the given set up is due toi. presence of acidii. presence of baseiii. presence of H⁺(aq) in the solutioniv. presence of Litmus which acts as an indicator(a) i and ii(b) Only ii(c) Only ii