In the first test tube, you add two drops of solution A and observe no change in colour of the solution.
In the second test tube, you add two drops of solution B and get green colour.
In the third test tube, you add two drops of solution C and get magenta (dark pink) colour.
Identify the nature of solutions A, B and C.
A-Neutral; B-Basic; C-Acidic
Understanding China Rose Indicator Colors
Indicators are substances that change color to help us determine if a solution is acidic, basic, or neutral. The China rose indicator has specific color changes associated with different types of solutions. Based on the observations provided in the question and the outcome indicated by the correct answer:
- When the China rose indicator is added to a Neutral solution, there is no change in its original color.
- When the China rose indicator is added to an Acidic solution, it turns green.
- When the China rose indicator is added to a Basic solution, it turns magenta (dark pink).
Analyzing Solution A's Nature
In the first test tube, two drops of solution A were added to the China rose indicator, and no change in color was observed. This observation directly corresponds to the behavior of the indicator with a neutral substance.
Therefore, solution A is Neutral.
Analyzing Solution B's Nature
In the second test tube, two drops of solution B were added, and the solution turned green. According to the specific color changes outlined for this question's context, a green color indicates an acidic nature.
Therefore, solution B is Acidic.
Analyzing Solution C's Nature
In the third test tube, two drops of solution C were added, and the solution turned magenta (dark pink). The question's correct answer implies that this color change signifies a basic solution.
Therefore, solution C is Basic.
Summary of Solution Natures
We can summarize the nature of each solution based on the observations and the China rose indicator's reactions as described:
| Solution | Observation with China Rose Indicator | Nature of Solution |
|---|---|---|
| A | No change in colour | Neutral |
| B | Green colour | Acidic |
| C | Magenta (dark pink) colour | Basic |
Thus, the nature of solutions A, B, and C are Neutral, Acidic, and Basic, respectively.
Important Questions from Concepts of Acids and Bases
Write the conjugate acids for the following Brönsted bases :
NH2-, NH3, HCOO-
The order of correct acidic strengths of halogen acids is
The base ionization constant, Kb, of ammonia in water is 1.8 × 10-5. The value of the acid ionization constant, Ka, of the conjugate acid, is closest to
- Which of the following chemical reaction is example for Lux-Flood definition ?
Identify A, B, C and D in the following table:
Name of the salt Salt obtained from Acid Base Ammonium chloride HCl A Sodium nitrate $HNO_3$ B Sodium chloride C D
Choose the correct option.
