Phenothalein, Unlike Litmus paper and Methyl Orange, it is most suitable for use of measuring substances of high hydrogen content ( strong acids and bases).
1 and 2 are natural acid base indicator while, 3 is man made avid base indicator. So, it is out.
Did not get the question?
It's litmus. All the other indicator s are
Man made but litmus is extracted from lichens
There are 2 scenarios here.
1.Litmus seems to be the odd one out while classifying the indicators.
Methyl orange and Phenolphthalein are artificial chemical pH indicators, whereas, Litmus is a naturally occurring pH indicator that is extracted from lichens.
2.However, if the color of solutions is considered, then Phenolphthalein is the odd one out.
Litmus and methyl orange show red color for low pH acidic solutions, whereas Phenolphthalein is colorless in acidic solutions.
Here's ur answer!!!
Universal indicator is the odd one out.
Hope u liked my answer
..Please mark me as brainliest.
Litmus (a) is the odd one out here because it is a natural indicator extracted by lichens while the rest all comes under the category of Artificial indicators.
read each and every line of your science book and practice each and every substance if ur maths book.
forget the sorry..