CTET & State TET Exam > CTET & State TET Questions > You have phenolphthalein solution in three te...
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You have phenolphthalein solution in three test tubes A, B and C. On putting 2-3 drops of dilute hydrochloric acid in A, a solution of sodium hydroxide in B and distilled water in C, if you immediately observe the colour of the solution in each test tube, you will find that the solution in the test tube
- a)A is colourless, in B is pink and in C is colourless
- b)A is pink, in B is pale green and in C is colourless
- c)A is colourless, in B is colourless and in C is pink
- d)A is pale green, in B is pink and in C is pink
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
You have phenolphthalein solution in three test tubes A, B and C. On p...
Solution:
To understand the color changes in the test tubes A, B, and C, we need to consider the reaction between phenolphthalein and the substances added to each test tube.
1. Reaction in Test Tube A (Dilute Hydrochloric Acid):
Phenolphthalein is a pH indicator that is colorless in acidic solutions and turns pink in basic solutions. When 2-3 drops of dilute hydrochloric acid are added to test tube A, the hydrochloric acid reacts with phenolphthalein and neutralizes its basic properties. As a result, the solution in test tube A remains colorless.
2. Reaction in Test Tube B (Sodium Hydroxide Solution):
Sodium hydroxide is a strong base, and when it is added to phenolphthalein, it causes the indicator to turn pink. Thus, when a solution of sodium hydroxide is added to test tube B, the phenolphthalein solution in the test tube becomes pink.
3. Reaction in Test Tube C (Distilled Water):
Distilled water is neutral and does not interact significantly with phenolphthalein. Therefore, when distilled water is added to test tube C, the phenolphthalein solution remains colorless.
Summary:
- Test tube A contains dilute hydrochloric acid, which neutralizes the basic properties of phenolphthalein, resulting in a colorless solution.
- Test tube B contains a sodium hydroxide solution, which causes phenolphthalein to turn pink, resulting in a pink solution.
- Test tube C contains distilled water, which does not cause any significant color change in phenolphthalein, resulting in a colorless solution.
Hence, the correct answer is option A: A is colorless, B is pink, and C is colorless.
To understand the color changes in the test tubes A, B, and C, we need to consider the reaction between phenolphthalein and the substances added to each test tube.
1. Reaction in Test Tube A (Dilute Hydrochloric Acid):
Phenolphthalein is a pH indicator that is colorless in acidic solutions and turns pink in basic solutions. When 2-3 drops of dilute hydrochloric acid are added to test tube A, the hydrochloric acid reacts with phenolphthalein and neutralizes its basic properties. As a result, the solution in test tube A remains colorless.
2. Reaction in Test Tube B (Sodium Hydroxide Solution):
Sodium hydroxide is a strong base, and when it is added to phenolphthalein, it causes the indicator to turn pink. Thus, when a solution of sodium hydroxide is added to test tube B, the phenolphthalein solution in the test tube becomes pink.
3. Reaction in Test Tube C (Distilled Water):
Distilled water is neutral and does not interact significantly with phenolphthalein. Therefore, when distilled water is added to test tube C, the phenolphthalein solution remains colorless.
Summary:
- Test tube A contains dilute hydrochloric acid, which neutralizes the basic properties of phenolphthalein, resulting in a colorless solution.
- Test tube B contains a sodium hydroxide solution, which causes phenolphthalein to turn pink, resulting in a pink solution.
- Test tube C contains distilled water, which does not cause any significant color change in phenolphthalein, resulting in a colorless solution.
Hence, the correct answer is option A: A is colorless, B is pink, and C is colorless.
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Community Answer
You have phenolphthalein solution in three test tubes A, B and C. On p...
Phenolphthalein is a colourless substance (indicator). In acidic solution, it remains colourless. However, adding a few drops of phenolphthalein to basic (alkaline) solution turns the solution pink.
Phenolphthalein + acidic solution (hydrochloric acid) → Colourless
Phenolphthalein + basic solution (sodium hydroxide) → Pink
Phenolphthalein + neutral solution (distilled water) → Colourless
Phenolphthalein + acidic solution (hydrochloric acid) → Colourless
Phenolphthalein + basic solution (sodium hydroxide) → Pink
Phenolphthalein + neutral solution (distilled water) → Colourless
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You have phenolphthalein solution in three test tubes A, B and C. On putting 2-3 drops of dilute hydrochloric acid in A, a solution of sodium hydroxide in B and distilled water in C, if you immediately observe the colour of the solution in each test tube, you will find that the solution in the test tubea)A is colourless, in B is pink and in C is colourlessb)A is pink, in B is pale green and in C is colourlessc)A is colourless, in B is colourless and in C is pinkd)A is pale green, in B is pink and in C is pinkCorrect answer is option 'A'. Can you explain this answer?
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You have phenolphthalein solution in three test tubes A, B and C. On putting 2-3 drops of dilute hydrochloric acid in A, a solution of sodium hydroxide in B and distilled water in C, if you immediately observe the colour of the solution in each test tube, you will find that the solution in the test tubea)A is colourless, in B is pink and in C is colourlessb)A is pink, in B is pale green and in C is colourlessc)A is colourless, in B is colourless and in C is pinkd)A is pale green, in B is pink and in C is pinkCorrect answer is option 'A'. 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 phenolphthalein solution in three test tubes A, B and C. On putting 2-3 drops of dilute hydrochloric acid in A, a solution of sodium hydroxide in B and distilled water in C, if you immediately observe the colour of the solution in each test tube, you will find that the solution in the test tubea)A is colourless, in B is pink and in C is colourlessb)A is pink, in B is pale green and in C is colourlessc)A is colourless, in B is colourless and in C is pinkd)A is pale green, in B is pink and in C is pinkCorrect answer is option 'A'. 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 phenolphthalein solution in three test tubes A, B and C. On putting 2-3 drops of dilute hydrochloric acid in A, a solution of sodium hydroxide in B and distilled water in C, if you immediately observe the colour of the solution in each test tube, you will find that the solution in the test tubea)A is colourless, in B is pink and in C is colourlessb)A is pink, in B is pale green and in C is colourlessc)A is colourless, in B is colourless and in C is pinkd)A is pale green, in B is pink and in C is pinkCorrect answer is option 'A'. Can you explain this answer?.
You have phenolphthalein solution in three test tubes A, B and C. On putting 2-3 drops of dilute hydrochloric acid in A, a solution of sodium hydroxide in B and distilled water in C, if you immediately observe the colour of the solution in each test tube, you will find that the solution in the test tubea)A is colourless, in B is pink and in C is colourlessb)A is pink, in B is pale green and in C is colourlessc)A is colourless, in B is colourless and in C is pinkd)A is pale green, in B is pink and in C is pinkCorrect answer is option 'A'. 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 phenolphthalein solution in three test tubes A, B and C. On putting 2-3 drops of dilute hydrochloric acid in A, a solution of sodium hydroxide in B and distilled water in C, if you immediately observe the colour of the solution in each test tube, you will find that the solution in the test tubea)A is colourless, in B is pink and in C is colourlessb)A is pink, in B is pale green and in C is colourlessc)A is colourless, in B is colourless and in C is pinkd)A is pale green, in B is pink and in C is pinkCorrect answer is option 'A'. 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 phenolphthalein solution in three test tubes A, B and C. On putting 2-3 drops of dilute hydrochloric acid in A, a solution of sodium hydroxide in B and distilled water in C, if you immediately observe the colour of the solution in each test tube, you will find that the solution in the test tubea)A is colourless, in B is pink and in C is colourlessb)A is pink, in B is pale green and in C is colourlessc)A is colourless, in B is colourless and in C is pinkd)A is pale green, in B is pink and in C is pinkCorrect answer is option 'A'. Can you explain this answer?.
Solutions for You have phenolphthalein solution in three test tubes A, B and C. On putting 2-3 drops of dilute hydrochloric acid in A, a solution of sodium hydroxide in B and distilled water in C, if you immediately observe the colour of the solution in each test tube, you will find that the solution in the test tubea)A is colourless, in B is pink and in C is colourlessb)A is pink, in B is pale green and in C is colourlessc)A is colourless, in B is colourless and in C is pinkd)A is pale green, in B is pink and in C is pinkCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for CTET & State TET.
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Here you can find the meaning of You have phenolphthalein solution in three test tubes A, B and C. On putting 2-3 drops of dilute hydrochloric acid in A, a solution of sodium hydroxide in B and distilled water in C, if you immediately observe the colour of the solution in each test tube, you will find that the solution in the test tubea)A is colourless, in B is pink and in C is colourlessb)A is pink, in B is pale green and in C is colourlessc)A is colourless, in B is colourless and in C is pinkd)A is pale green, in B is pink and in C is pinkCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
You have phenolphthalein solution in three test tubes A, B and C. On putting 2-3 drops of dilute hydrochloric acid in A, a solution of sodium hydroxide in B and distilled water in C, if you immediately observe the colour of the solution in each test tube, you will find that the solution in the test tubea)A is colourless, in B is pink and in C is colourlessb)A is pink, in B is pale green and in C is colourlessc)A is colourless, in B is colourless and in C is pinkd)A is pale green, in B is pink and in C is pinkCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for You have phenolphthalein solution in three test tubes A, B and C. On putting 2-3 drops of dilute hydrochloric acid in A, a solution of sodium hydroxide in B and distilled water in C, if you immediately observe the colour of the solution in each test tube, you will find that the solution in the test tubea)A is colourless, in B is pink and in C is colourlessb)A is pink, in B is pale green and in C is colourlessc)A is colourless, in B is colourless and in C is pinkd)A is pale green, in B is pink and in C is pinkCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of You have phenolphthalein solution in three test tubes A, B and C. On putting 2-3 drops of dilute hydrochloric acid in A, a solution of sodium hydroxide in B and distilled water in C, if you immediately observe the colour of the solution in each test tube, you will find that the solution in the test tubea)A is colourless, in B is pink and in C is colourlessb)A is pink, in B is pale green and in C is colourlessc)A is colourless, in B is colourless and in C is pinkd)A is pale green, in B is pink and in C is pinkCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice You have phenolphthalein solution in three test tubes A, B and C. On putting 2-3 drops of dilute hydrochloric acid in A, a solution of sodium hydroxide in B and distilled water in C, if you immediately observe the colour of the solution in each test tube, you will find that the solution in the test tubea)A is colourless, in B is pink and in C is colourlessb)A is pink, in B is pale green and in C is colourlessc)A is colourless, in B is colourless and in C is pinkd)A is pale green, in B is pink and in C is pinkCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice CTET & State TET tests.
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