Chemistry
Grade-10
Easy
Question
Rahul experimented, as shown in the following figure. He took some solutions and added phenolphthalein indicators to them. Identify the X, Y and Z in this experiment.
- X → Acid, Y → Base, Z → Acid
- X → Base, Y → Acid, Z → Base
- X → Base, Y → Acid, Z → Acid
- X → Acid, Y → Base, Z → Base
Hint:
Phenolphthalein turns colorless in acidic solutions and pink in basic solutions.
The correct answer is: X → Base, Y → Acid, Z → Base
Phenolphthalein is often used as an indicator in acid–base titrations. It turns colorless in acidic solutions and pink in basic solutions.
X- Base
Y- Acid
Z- Base
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