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Four solution P, Q, R, S have PH 2, 7, 9, 13 respectively. Which of the above solution will turn phenolphthalein pink?
- a)S and R
- b)P only
- c)Q and S
- d)S only
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Four solution P, Q, R, S have PH 2, 7, 9, 13 respectively. Which of th...
Solution S and R will turn phenolphthalein pink because they are basic in nature and we know that bases turn phenolphthalein pink.
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Four solution P, Q, R, S have PH 2, 7, 9, 13 respectively. Which of th...
Option a is correct friend. Because, Phenolphthalein solution is used as indicator to detect the presence of base. If the solution of Phenolphthalein changes into pink, then we notice that the solution is a base. So, as the pH value is 13 and 9 which is more than the pH value 7, so it is considered as a base.
Or in other words, Phenolphthalein is a weak acid which is why when it is added in a strong base, it give pink colour and the colour gets extreme (intense) as the pH of base increases.
[Note:- If the pH value is less than 7, then it indicates acid and if the pH value is more than 7, then it indicates base and when the pH value is 7, then it is neutral].
Or in other words, Phenolphthalein is a weak acid which is why when it is added in a strong base, it give pink colour and the colour gets extreme (intense) as the pH of base increases.
[Note:- If the pH value is less than 7, then it indicates acid and if the pH value is more than 7, then it indicates base and when the pH value is 7, then it is neutral].
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Four solution P, Q, R, S have PH 2, 7, 9, 13 respectively. Which of th...
Solution:
The question states that there are four solutions named P, Q, R, and S and their respective pH values are 2, 7, 9, and 13. The question asks which solution will turn phenolphthalein pink. Phenolphthalein is a pH indicator that changes color from colorless to pink in the pH range of 8.2 to 10.
To find out which solution will turn phenolphthalein pink, we need to determine which solutions have a pH value in the range of 8.2 to 10.
- Solution S: pH = 13, which is outside the pH range of phenolphthalein. Therefore, solution S will not turn phenolphthalein pink.
- Solution R: pH = 9, which is within the pH range of phenolphthalein. Therefore, solution R will turn phenolphthalein pink.
- Solution Q: pH = 7, which is below the pH range of phenolphthalein. Therefore, solution Q will not turn phenolphthalein pink.
- Solution P: pH = 2, which is far below the pH range of phenolphthalein. Therefore, solution P will not turn phenolphthalein pink.
Therefore, the solutions that will turn phenolphthalein pink are R and S.
Answer: Option A, S and R
The question states that there are four solutions named P, Q, R, and S and their respective pH values are 2, 7, 9, and 13. The question asks which solution will turn phenolphthalein pink. Phenolphthalein is a pH indicator that changes color from colorless to pink in the pH range of 8.2 to 10.
To find out which solution will turn phenolphthalein pink, we need to determine which solutions have a pH value in the range of 8.2 to 10.
- Solution S: pH = 13, which is outside the pH range of phenolphthalein. Therefore, solution S will not turn phenolphthalein pink.
- Solution R: pH = 9, which is within the pH range of phenolphthalein. Therefore, solution R will turn phenolphthalein pink.
- Solution Q: pH = 7, which is below the pH range of phenolphthalein. Therefore, solution Q will not turn phenolphthalein pink.
- Solution P: pH = 2, which is far below the pH range of phenolphthalein. Therefore, solution P will not turn phenolphthalein pink.
Therefore, the solutions that will turn phenolphthalein pink are R and S.
Answer: Option A, S and R
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Four solution P, Q, R, S have PH 2, 7, 9, 13 respectively. Which of the above solution will turn phenolphthalein pink?a)S and Rb)P onlyc)Q and Sd)S onlyCorrect answer is option 'A'. Can you explain this answer? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Four solution P, Q, R, S have PH 2, 7, 9, 13 respectively. Which of the above solution will turn phenolphthalein pink?a)S and Rb)P onlyc)Q and Sd)S onlyCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Four solution P, Q, R, S have PH 2, 7, 9, 13 respectively. Which of the above solution will turn phenolphthalein pink?a)S and Rb)P onlyc)Q and Sd)S onlyCorrect answer is option 'A'. Can you explain this answer?.
Four solution P, Q, R, S have PH 2, 7, 9, 13 respectively. Which of the above solution will turn phenolphthalein pink?a)S and Rb)P onlyc)Q and Sd)S onlyCorrect answer is option 'A'. Can you explain this answer? for Class 10 2025 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Four solution P, Q, R, S have PH 2, 7, 9, 13 respectively. Which of the above solution will turn phenolphthalein pink?a)S and Rb)P onlyc)Q and Sd)S onlyCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 10 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Four solution P, Q, R, S have PH 2, 7, 9, 13 respectively. Which of the above solution will turn phenolphthalein pink?a)S and Rb)P onlyc)Q and Sd)S onlyCorrect answer is option 'A'. Can you explain this answer?.
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