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Doctors Medicines MCQs Q&A

Consider the following regarding the indicator with regard to the identification of acid:  I. Blue Litmus Paper: turns red  II. Phenolphthalein: From violet to yellow  III. Methyl Orange: From orange to green  Which among the above is/are correct?

Consider the following regarding the indicator with regard to the identification of acid:  I. Blue Litmus Paper: turns red  II. Phenolphthalein: From violet to yellow  III. Methyl Orange: From orange to green  Which among the above is/are correct? Correct Answer Only I

  • Acid turns blue litmus paper red.
  • Phenolphthalein turns colorless in acidic solutions.
  • Methyl Orange turns red in acidic solutions.
Indicators  Colour Changes 
Blue Litmus Paper Turns red 
Phenolphthalein  Remains colorless 
Methyl Orange  From orange to red

 

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