Advertisements
Advertisements
प्रश्न
Two solutions A and B have pH values of 2 and 9 respectively which one of these two will give a pink colour with phenolphthalein indicator?
उत्तर
Solution B with pH value 9 will give pink colour with phenolphthalein.
Concept Insight: Bases give pink colour with phenolphthalein because a base will abstract two protons from phenolphthalein and the resulting phenolphthalein ion provides pink colour to the solution.
APPEARS IN
संबंधित प्रश्न
State the inference drawn from the following observations
pH of liquid R is 10. What kind of substance is R?
What would you observe when red litmus paper is introduced into a solution of ammonia in water?
Define pH.
Explain, why a universal indicator is preferred to acid-base indicators.
Name two indicators which can identify the presence of an acid?
What can you say about the pH of a solution that liberates carbon dioxide from sodium carbonate?
To increase the pH value of neutral solution, we should add
What should be added to Increase the pH value .
State the change noticed when blue litmus and red litmus is introduced in the following solution:
NaCl solution
Does pH value of pure water change if common salt is added to it?
