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Assertion : Phenolphthalein gives pink colour in basic solution.
Reason : Phenolphthalein is a natural indicator.
- a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
- b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
- c)Assertion (A) is true but reason (R) is false.
- d)Assertion (A) is false but reason (R) is true.
- e)Both Assertion and Reason are false.
Correct answer is option 'C'. Can you explain this answer?
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Assertion : Phenolphthalein gives pink colour in basic solution.Reaso...
Assertion (A) is true but reason (R) is false.
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Assertion : Phenolphthalein gives pink colour in basic solution.Reaso...
Assertion: Phenolphthalein gives a pink color in a basic solution.
Reason: Phenolphthalein is a natural indicator.
Explanation:
Phenolphthalein is a commonly used chemical indicator that changes color depending on the pH of the solution it is in. It is colorless in acidic solutions and turns pink or magenta in basic solutions.
Assertion (A) is true:
Phenolphthalein does give a pink color in a basic solution. This is a known characteristic of phenolphthalein and is widely used in experiments and titrations to indicate the endpoint of a reaction.
Reason (R) is false:
However, the reason given is not correct. While phenolphthalein is indeed a natural indicator, the fact that it is a natural indicator does not explain why it turns pink in a basic solution. The color change is due to a change in the structure of phenolphthalein molecules when it reacts with hydroxide ions (OH-) present in basic solutions. This change in structure results in the formation of a pink-colored species.
Conclusion:
Therefore, the correct answer is option C, where Assertion (A) is true but Reason (R) is false. Phenolphthalein does give a pink color in a basic solution, but the reason given for this is incorrect.
Reason: Phenolphthalein is a natural indicator.
Explanation:
Phenolphthalein is a commonly used chemical indicator that changes color depending on the pH of the solution it is in. It is colorless in acidic solutions and turns pink or magenta in basic solutions.
Assertion (A) is true:
Phenolphthalein does give a pink color in a basic solution. This is a known characteristic of phenolphthalein and is widely used in experiments and titrations to indicate the endpoint of a reaction.
Reason (R) is false:
However, the reason given is not correct. While phenolphthalein is indeed a natural indicator, the fact that it is a natural indicator does not explain why it turns pink in a basic solution. The color change is due to a change in the structure of phenolphthalein molecules when it reacts with hydroxide ions (OH-) present in basic solutions. This change in structure results in the formation of a pink-colored species.
Conclusion:
Therefore, the correct answer is option C, where Assertion (A) is true but Reason (R) is false. Phenolphthalein does give a pink color in a basic solution, but the reason given for this is incorrect.
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Assertion : Phenolphthalein gives pink colour in basic solution.Reaso...
A is true r is false
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Assertion : Phenolphthalein gives pink colour in basic solution.Reason : Phenolphthalein is a natural indicator.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer?
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Assertion : Phenolphthalein gives pink colour in basic solution.Reason : Phenolphthalein is a natural indicator.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Assertion : Phenolphthalein gives pink colour in basic solution.Reason : Phenolphthalein is a natural indicator.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion : Phenolphthalein gives pink colour in basic solution.Reason : Phenolphthalein is a natural indicator.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer?.
Assertion : Phenolphthalein gives pink colour in basic solution.Reason : Phenolphthalein is a natural indicator.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Assertion : Phenolphthalein gives pink colour in basic solution.Reason : Phenolphthalein is a natural indicator.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion : Phenolphthalein gives pink colour in basic solution.Reason : Phenolphthalein is a natural indicator.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer?.
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