Advertisements
Advertisements
प्रश्न
What is the effect of adding sodium hydroxide solution to these olfactory indicators?
उत्तर
The characteristic smell of an olfactory indicator is lost when it is added to a sodium hydroxide solution.
APPEARS IN
संबंधित प्रश्न
What is an indicator? Name three common 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
The pH of soil A is 7.5 while that of soil B is 4.5. Which of the two soils, A or B, should be treated with powdered chalk to adjust its pH and why?
Fill in the following blank with suitable words:
Neutral substances have a pH of ................
(b) Name the acid or alkalis used to make (i) car batteries (ii) explosives (iii) soaps (iv) fertilisers.
What effect does the concentration of OH− ions have on the nature of a solution?
Solution A turns universal indicator blue to purple whereas solution B turns universal indicator orange to red.
Name any two substances which can give solutions like B.
Write a note on:
Litmus
Write a note on:
Methyl orange
Prepare red cabbage juice by boiling a piece of red cabbage in water. Use it as an indicator and test the acidic and basic solutions with it. Present your observations in the form of a table.