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On adding phenolphthalein indicator to a colourless solution, no change is observed. The nature of the solution may be
- a)acidic or basic
- b)basic
- c)acidic or neutral
- d)basic or neutral
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
On adding phenolphthalein indicator to a colourless solution, no chang...
Since phenolphthalein turns pink in a basic solution and remains colourless in acidic and neutral solutions, if there's no change observed upon its addition, the solution must be either acidic or neutral.
Most Upvoted Answer
On adding phenolphthalein indicator to a colourless solution, no chang...
When we add phenolphthalein indicator to a base, and a base only, it turns dark pink. It does not change color in an acid or a neutral substance. If no change is observed, it is either an acid or a neutral substance. So, option c.
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Community Answer
On adding phenolphthalein indicator to a colourless solution, no chang...
Explanation:
Phenolphthalein Indicator:
Phenolphthalein is a chemical compound often used as a pH indicator. It is colorless in acidic solutions and turns pink in basic solutions.
Observation:
When phenolphthalein indicator is added to a colorless solution and there is no change in color, it indicates that the solution is either acidic or neutral.
Interpretation:
- If the solution were basic, phenolphthalein would have turned pink.
- Since there is no change in color, it rules out the possibility of the solution being basic.
- This leaves us with the options of the solution being acidic or neutral.
Conclusion:
Therefore, the nature of the solution can be either acidic or neutral when phenolphthalein indicator does not show any color change.
Phenolphthalein Indicator:
Phenolphthalein is a chemical compound often used as a pH indicator. It is colorless in acidic solutions and turns pink in basic solutions.
Observation:
When phenolphthalein indicator is added to a colorless solution and there is no change in color, it indicates that the solution is either acidic or neutral.
Interpretation:
- If the solution were basic, phenolphthalein would have turned pink.
- Since there is no change in color, it rules out the possibility of the solution being basic.
- This leaves us with the options of the solution being acidic or neutral.
Conclusion:
Therefore, the nature of the solution can be either acidic or neutral when phenolphthalein indicator does not show any color change.
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On adding phenolphthalein indicator to a colourless solution, no change is observed. The nature of the solution may bea)acidic or basicb)basicc)acidic or neutrald)basic or neutralCorrect answer is option 'C'. Can you explain this answer?
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On adding phenolphthalein indicator to a colourless solution, no change is observed. The nature of the solution may bea)acidic or basicb)basicc)acidic or neutrald)basic or neutralCorrect answer is option 'C'. Can you explain this answer? for Class 7 2025 is part of Class 7 preparation. The Question and answers have been prepared according to the Class 7 exam syllabus. Information about On adding phenolphthalein indicator to a colourless solution, no change is observed. The nature of the solution may bea)acidic or basicb)basicc)acidic or neutrald)basic or neutralCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 7 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for On adding phenolphthalein indicator to a colourless solution, no change is observed. The nature of the solution may bea)acidic or basicb)basicc)acidic or neutrald)basic or neutralCorrect answer is option 'C'. Can you explain this answer?.
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