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Ayush and Ishoo were given one test tube each. One of the test tube contained water and the other contained a solution of sodium hydroxide. They were asked to identify the test tube containing NaOH solution. Which one of the following can be used for correctly identifying the required test tube?
- a)sodium carbonate solution
- b)Red litmus
- c)Blue litmus
- d)Dilute hydrochloric acid
Correct answer is option 'B'. Can you explain this answer?
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Ayush and Ishoo were given onetest tube each.One of the test tube cont...
A base (NaOH) turns red litmus blue but a netrul compund (water) does not show any colour change.
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Ayush and Ishoo were given onetest tube each.One of the test tube cont...
Identification of Test Tube Containing NaOH Solution
To identify the test tube containing NaOH solution, Ayush and Ishoo can perform a simple experiment using different reagents. The correct reagent to use in this case is option 'B', which is red litmus paper.
Here is the detailed explanation:
1. Purpose:
The purpose of this experiment is to distinguish between water and a solution of sodium hydroxide (NaOH) by observing the reaction of the substances with red litmus paper.
2. Materials:
- Two test tubes
- Red litmus paper
- Water
- Sodium hydroxide (NaOH) solution
- Dropper or pipette
3. Procedure:
- Ayush and Ishoo should label each test tube as 'A' and 'B' to keep track of their observations.
- They can start by placing a few drops of water in one test tube (A) and a few drops of NaOH solution in the other test tube (B).
- Then, they should moisten a piece of red litmus paper by dipping it in water and place it in both test tubes, one at a time.
- They should observe the color change of the red litmus paper in each test tube and record their observations.
4. Observation and Explanation:
- In the test tube with water (A), the red litmus paper will remain unchanged. This is because water is neutral and does not react with red litmus paper, which is also neutral.
- In the test tube with NaOH solution (B), the red litmus paper will turn blue. This is because sodium hydroxide is a strong base that can react with red litmus paper, causing it to change color from red to blue.
5. Conclusion:
Based on the observation that the red litmus paper turns blue in test tube B, Ayush and Ishoo can conclude that the test tube B contains NaOH solution.
In summary, the red litmus paper is used to identify the test tube containing NaOH solution because it undergoes a color change from red to blue in the presence of a strong base like sodium hydroxide. This experiment allows Ayush and Ishoo to distinguish between water and NaOH solution by using a simple reagent.
To identify the test tube containing NaOH solution, Ayush and Ishoo can perform a simple experiment using different reagents. The correct reagent to use in this case is option 'B', which is red litmus paper.
Here is the detailed explanation:
1. Purpose:
The purpose of this experiment is to distinguish between water and a solution of sodium hydroxide (NaOH) by observing the reaction of the substances with red litmus paper.
2. Materials:
- Two test tubes
- Red litmus paper
- Water
- Sodium hydroxide (NaOH) solution
- Dropper or pipette
3. Procedure:
- Ayush and Ishoo should label each test tube as 'A' and 'B' to keep track of their observations.
- They can start by placing a few drops of water in one test tube (A) and a few drops of NaOH solution in the other test tube (B).
- Then, they should moisten a piece of red litmus paper by dipping it in water and place it in both test tubes, one at a time.
- They should observe the color change of the red litmus paper in each test tube and record their observations.
4. Observation and Explanation:
- In the test tube with water (A), the red litmus paper will remain unchanged. This is because water is neutral and does not react with red litmus paper, which is also neutral.
- In the test tube with NaOH solution (B), the red litmus paper will turn blue. This is because sodium hydroxide is a strong base that can react with red litmus paper, causing it to change color from red to blue.
5. Conclusion:
Based on the observation that the red litmus paper turns blue in test tube B, Ayush and Ishoo can conclude that the test tube B contains NaOH solution.
In summary, the red litmus paper is used to identify the test tube containing NaOH solution because it undergoes a color change from red to blue in the presence of a strong base like sodium hydroxide. This experiment allows Ayush and Ishoo to distinguish between water and NaOH solution by using a simple reagent.
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Ayush and Ishoo were given onetest tube each.One of the test tube containedwater and the other containeda solution of sodium hydroxide. They were asked to identify the test tube containing NaOH solution. Which one of the following can be used for correctly identifying the required test tube?a)sodium carbonate solutionb)Red litmusc)Blue litmusd)Dilute hydrochloric acidCorrect answer is option 'B'. Can you explain this answer?
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