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  • On adding a few drops of universal indicator in three colourless solutions  and <img alt="Z" src="https://entrancecorner.codecogs.com/gif.latex?%5Cinline%20Z" /

On adding a few drops of universal indicator in three colourless solutions X,Y and Z taken separately in three test tubes, a student observed the changes in colour as green in X, red in Y and blue in Z.

(a) Arrange  X,Yand Z in increasing order of their pH values.
(b) Which one of the three, X,Y and Z , will change the colour of phenolphthalein ? Why ?

 

 

 

 
 
 
 
 

Answers (1)

(a) Increasing order of P^{H}  Y< X< Z

(b) Z will change the colour of phenolphthalein because 'Z' is basic in nature.

Posted by

Sumit Saini

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