Advertisements
Advertisements
प्रश्न
Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are ______.
विकल्प
red and blue.
blue and red.
pink and colourless.
colourless and pink.
Advertisements
उत्तर
Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are colourless and pink.
Explanation:
Phenolphthalein remains colourless in acidic solution and turns pink in basic solution.
APPEARS IN
संबंधित प्रश्न
Write a balanced chemical equation for the reaction of sodium hydroxide solution with iron (III) chloride solution
What happens to the temperature of the solution when an acid is neutralised?
Give the names and formulae of two strong bases.
One of the following salts will give an alkaline solution on dissolving in water. This is:
Choosing the correct words given in brackets, complete the sentence given below:
A(n) ______ (acid/basic) salt is one in which the hydrogen of an acid has been partially replaced by a ______ (metal/non-metal).
Heshna and Keerthi are friends. Keerthi’s teeth are white without caries, but Heshna has teeth with caries. Why? How is it formed?
What happens when a solution of an acid is mixed with a solution of a base in a test tube?
(i) Temperature of the solution decreases.
(ii) Temperature of the solution increases.
(iii) Temperature of the solution remains the same.
(iv) Salt formation takes place.
Acids have a sour taste and they are soapy to touch.
Explain the following:
\[\ce{H3PO3}\] is not a tribasic acid.
Bring the soil sample of your area, find out if it is acidic, basic or neutral. Discuss with farmers if they treat the soil in any manner.
