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प्रश्न
What is an indicator?
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उत्तर
An acid-base indicator is a chemical substance that indicates the acidic or basic nature of a solution by a suitable colour change.
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संबंधित प्रश्न
Five solutions, A, B, C, D and E, when tested with universal indicator, showed pH as 4, 1, 11, 7 and 9, respectively. Which solution is
- neutral?
- strongly alkaline?
- strongly acidic?
- weakly acidic?
- weakly alkaline?
Arrange the pH in increasing order of hydrogen-ion concentration.
A milkman adds a very small amount of baking soda to fresh milk. Why does he shift the pH of the fresh milk from 6 to slightly alkaline?
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Which is more basic (or more alkaline)?
A solution of pH = 8 or a solution of pH = 11.
Name the scientist who developed the pH scale.
What is a universal indicator?
What would you expect the pH of pure water to be?
Someone put some universal indicator paper into vinegar. The pH is 3. What does this tell you about the vinegar?
Add a few drops of hibiscus indicator to the soap solution. What do you observe?
A milkman adds a very small amount of baking soda to fresh milk. Why does this milk take a long time to set as curd?
