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You have two test tubes 'A' and 'B'. Test tube 'A' contains paste of turmeric, whereas test tube 'B' contains aqueous solution of phenolphthalein. On adding a few drops of dilute hydrochloric acid to these test tubes, the contents of
  • a)
    'A' would remain yellow, while those of 'B' would appear pink
  • b)
    'A' would remain yellow, while those of 'B' would remain colourless
  • c)
    'A' and 'B' both would appear red
  • d)
    'A' would appear red, while those of 'B' would remain colourless
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
You have two test tubes A and B. Test tube A contains paste of turmeri...
Being an acid, hydrochloric acid does not change the colour of turmeric indicator, as acids do not change the colour of turmeric indicator. Also, phenolphthalein indicator would remain colourless in acids.
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Community Answer
You have two test tubes A and B. Test tube A contains paste of turmeri...
Understanding the Reaction in Test Tube A (Turmeric)
When dilute hydrochloric acid is added to test tube A containing turmeric paste, the following occurs:
- Turmeric contains curcumin, which is a natural pH indicator.
- In acidic conditions (like when HCl is added), curcumin remains yellow.
- Therefore, the contents of test tube A will remain yellow.
Understanding the Reaction in Test Tube B (Phenolphthalein)
In test tube B, which contains an aqueous solution of phenolphthalein, the reaction is different:
- Phenolphthalein is a common pH indicator that is colorless in acidic solutions.
- When dilute hydrochloric acid is added, the pH of the solution decreases, causing phenolphthalein to remain colorless.
- Thus, the contents of test tube B will remain colorless.
Conclusion
Based on the reactions in both test tubes:
- Test tube A (turmeric) remains yellow.
- Test tube B (phenolphthalein) remains colorless.
Hence, the correct answer is option 'B': A would remain yellow, while those of B would remain colorless.
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You have two test tubes A and B. Test tube A contains paste of turmeric, whereas test tube B contains aqueous solution of phenolphthalein. On adding a few drops of dilute hydrochloric acid to these test tubes, the contents ofa)A would remain yellow, while those of B would appear pinkb)A would remain yellow, while those of B would remain colourlessc)A and B both would appear redd)A would appear red, while those of B would remain colourlessCorrect answer is option 'B'. Can you explain this answer?
Question Description
You have two test tubes A and B. Test tube A contains paste of turmeric, whereas test tube B contains aqueous solution of phenolphthalein. On adding a few drops of dilute hydrochloric acid to these test tubes, the contents ofa)A would remain yellow, while those of B would appear pinkb)A would remain yellow, while those of B would remain colourlessc)A and B both would appear redd)A would appear red, while those of B would remain colourlessCorrect answer is option 'B'. Can you explain this answer? for CTET & State TET 2024 is part of CTET & State TET preparation. The Question and answers have been prepared according to the CTET & State TET exam syllabus. Information about You have two test tubes A and B. Test tube A contains paste of turmeric, whereas test tube B contains aqueous solution of phenolphthalein. On adding a few drops of dilute hydrochloric acid to these test tubes, the contents ofa)A would remain yellow, while those of B would appear pinkb)A would remain yellow, while those of B would remain colourlessc)A and B both would appear redd)A would appear red, while those of B would remain colourlessCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for CTET & State TET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for You have two test tubes A and B. Test tube A contains paste of turmeric, whereas test tube B contains aqueous solution of phenolphthalein. On adding a few drops of dilute hydrochloric acid to these test tubes, the contents ofa)A would remain yellow, while those of B would appear pinkb)A would remain yellow, while those of B would remain colourlessc)A and B both would appear redd)A would appear red, while those of B would remain colourlessCorrect answer is option 'B'. Can you explain this answer?.
Solutions for You have two test tubes A and B. Test tube A contains paste of turmeric, whereas test tube B contains aqueous solution of phenolphthalein. On adding a few drops of dilute hydrochloric acid to these test tubes, the contents ofa)A would remain yellow, while those of B would appear pinkb)A would remain yellow, while those of B would remain colourlessc)A and B both would appear redd)A would appear red, while those of B would remain colourlessCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for CTET & State TET. Download more important topics, notes, lectures and mock test series for CTET & State TET Exam by signing up for free.
Here you can find the meaning of You have two test tubes A and B. Test tube A contains paste of turmeric, whereas test tube B contains aqueous solution of phenolphthalein. On adding a few drops of dilute hydrochloric acid to these test tubes, the contents ofa)A would remain yellow, while those of B would appear pinkb)A would remain yellow, while those of B would remain colourlessc)A and B both would appear redd)A would appear red, while those of B would remain colourlessCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of You have two test tubes A and B. Test tube A contains paste of turmeric, whereas test tube B contains aqueous solution of phenolphthalein. On adding a few drops of dilute hydrochloric acid to these test tubes, the contents ofa)A would remain yellow, while those of B would appear pinkb)A would remain yellow, while those of B would remain colourlessc)A and B both would appear redd)A would appear red, while those of B would remain colourlessCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for You have two test tubes A and B. Test tube A contains paste of turmeric, whereas test tube B contains aqueous solution of phenolphthalein. On adding a few drops of dilute hydrochloric acid to these test tubes, the contents ofa)A would remain yellow, while those of B would appear pinkb)A would remain yellow, while those of B would remain colourlessc)A and B both would appear redd)A would appear red, while those of B would remain colourlessCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of You have two test tubes A and B. Test tube A contains paste of turmeric, whereas test tube B contains aqueous solution of phenolphthalein. On adding a few drops of dilute hydrochloric acid to these test tubes, the contents ofa)A would remain yellow, while those of B would appear pinkb)A would remain yellow, while those of B would remain colourlessc)A and B both would appear redd)A would appear red, while those of B would remain colourlessCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice You have two test tubes A and B. Test tube A contains paste of turmeric, whereas test tube B contains aqueous solution of phenolphthalein. On adding a few drops of dilute hydrochloric acid to these test tubes, the contents ofa)A would remain yellow, while those of B would appear pinkb)A would remain yellow, while those of B would remain colourlessc)A and B both would appear redd)A would appear red, while those of B would remain colourlessCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice CTET & State TET tests.
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