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On adding a few drops of universal indic...

On adding a few drops of universal indicator solution to three unknown colourless solutions `P,Q,` and `R` taken separately in three test-tubes shown in the diagrams, a student observed the changes in colour as green in solution `P` red in solution `Q` and violet in solution `R`.
The decreasing order of the pH of the three solutions is:

A

`(R) gt (P) gt (Q)`

B

`(Q) gt (R) gt (P)`

C

`(P) gt (Q) gt (R)`

D

`(Q) gt (P) gt (R)`

Text Solution

Verified by Experts

The correct Answer is:
A
.R. is violet, basic i.e., higher pH.
.P. is green, neutral i.e., pH = 7
.Q. is red, acidic, i.e. `pH lt 7 `
`therefore R gt P gt Q`
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