Advertisements
Advertisements
Question
How will you prepare natural indicator from turmeric powder?
Advertisements
Solution
- Turmeric indicator is one of the natural indicator.
- By adding a small amount of water to turmeric powder, a paste is prepared.
- This is applied on a blotting paper or filter paper and dried.
- These strips are used as indicators to find the nature of the solution.
- In acidic solution, turmeric indicator paper has no change in colour.
- That means, it remains yellow. In the basic solution, the colour changes from yellow to red.
APPEARS IN
RELATED QUESTIONS
What effect does the concentration of H+ (aq) ions have on the nature of the solution?
Fill in the blank in the following sentences:
Those substances whose smell (or odour) changes in acidic or basic solution are called .......................... indicators.
The property which is not shown by acids is:
(a) they have sour taste
(b) they feel soapy
(c) they turn litmus red
(d) their pH is less than seven
What colour will universal indicator show if you add it to the following substances?
(a) potassium hydroxide, pH = 12
(b) soda water, pH = 5
(c) sulphuric acid, pH = 2
Explain the pH change as the cause of tooth decay. How can tooth decay caused by pH change be prevented?
What colour would the universal indicator show in an aqueous solution of sugar? Why?
Hibiscus flower is an example for natural indicator.
Which one of the following can be used as an acid- base indicator by a visually impared student?
What is the colour of phenolphthalein in the basic solution?
Take a shirt with turmeric powder strain. Wash the shirt with soap. Do you observe any change in the colour? Why?
