On adding a few drops of universal indicator to three unknown colourless solutions P, Q and R taken separately in the three test tubes. A student observed the changes in colour as green in P, red in Q and violet in R.The decreasing order of pH of the solutions taken is :P > Q > RR > P > QQ > P > RR > Q > P
Question
On adding a few drops of universal indicator to three unknown colourless solutions P, Q and R taken separately in the three test tubes. A student observed the changes in colour as green in P, red in Q and violet in R.The decreasing order of pH of the solutions taken is :P > Q > RR > P > QQ > P > RR > Q > P
Solution
The colors observed after adding a universal indicator to the solutions P, Q, and R correspond to different pH levels.
Green indicates a neutral pH of around 7, which is observed in solution P.
Red indicates a highly acidic solution with a low pH, which is observed in solution Q.
Violet indicates a highly basic or alkaline solution with a high pH, which is observed in solution R.
Therefore, the decreasing order of pH of the solutions is R > P > Q.
Similar Questions
Which method uses the color changes of several indicators to measure the pH of a solution?
The figure given below shows the colour change in test tubes A,B and C when china rose indicator is added in them. The respective solutions in test tubes A, B and C are
Multiple Choice QuestionWhich method uses the color changes of several indicators to measure the pH of a solution?Multiple choice question.pH meterphenolphthaleinpH paperlitmus paper
You have been provided with three test tubes. One of them containsdistilled water and the other two contain an acidic solution and a basicsolution, respectively. If you are given only red litmus paper, how willyou identify the contents of each test tube?
In the titration experiment you carried out in your CHM 108 practical, the colour change of yoursolution when using the phenolphthalein indicator isA. Colourless to PinkB. Pink to ColourlessC. Pink to RedD. Pink to Yellow
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.