Advertisements
Advertisements
Question
Which one of the following can be used as an acid- base indicator by a visually impared student?
Options
Litmus
Turmeric
Vanilla essence
Petunia leaves
Solution
Vanilla essence
Explanation -
Vanilla essence is an olfactory inidicator.
APPEARS IN
RELATED QUESTIONS
Name an indicator which is red in acid solution but turns blue in basic solution.
A beaker of concentrated hydrochloric acid has a pH of 1. What colour will full range universal indicator turn if it is added to this beaker? Is it a strong or a weak acid?
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?
How does a universal indicator work?
Water is a neutral substance. What colour will you get when you add a few drops of universal indicator to a test-tube containing water?
What effect does the concentration of OH− ions have on the nature of a solution?
The pH values of five solutions A, B, C, D and E are given below:
| A | 1 |
| B | 5 |
| C | 7 |
| D | 11 |
| E | 13 |
Which solution is weakly alkaline.
The pH values of five solutions A, B, C, D and E are given below:
| A | 1 |
| B | 5 |
| C | 7 |
| D | 11 |
| E | 13 |
State whether the following statements are true or false. Correct the false statements.
Phenolphthalein is a natural indicator.
Assertion: Methyl orange and phenolphthalein are natural indicators.
Reason: Methyl orange is yellow in colour while phenolphthalein is pink.
