Advertisements
Advertisements
Question
How does a universal indicator work?
Solution
When one or two drops of an acid or a base solution are added to a universal indicator paper, it generates a new colour. By comparing the colour with the pH scale, the pH of the added solution is known. From the pH value, we can identify the strength of the acid or base solution.
APPEARS IN
RELATED QUESTIONS
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.
Indicator is a substance which shows different colours in acidic and basic solutions.
If someone is suffering from the problem of acidity after overeating, which of the following would you suggest as remedy?
Lemon juice, Vinegar, Banking soda solution
Give reason for your choice.
Two solutions X and Y are tested with universal indicator. Solution X turns orange whereas solution Y turns red. Which of the solutions is a stronger acid?
Two solutions X and Y have pH = 4 and pH = 8, respectively. Which solution will give alkaline reaction and which one acidic?
Fill in the following blank with suitable words:
The more acidic a solution, the ................. the pH.
What does the pH of a solution signify? Three solution A, B and C have pH values of 6, 4 and 10 respectively. Which of the solutions is highly acidic?
A solution turns blue litmus red. Its pH is likely to be:
(a) 7
(b) 5
(c) 8
(d) 14
Which of the following is not a natural indicator?
Lemon juice will turn ______.
