Advertisements
Advertisements
Question
A student puts a drop of reaction mixture of a saponification reaction first a blue litmus paper and then on a red litmus paper. He may observe that:
(a) There is no change in the blue litmus paper and the red litmus paper turns white.
(b) There is no change in the red litmus paper and the blue litmus paper turns red.
(c) There is no change in the blue litmus paper and the red litmus paper turns blue.
(d) No change in colour is observed in both the litmus papers
Advertisements
Solution
(c) The molecules of soap are sodium or potassium salts of long chain carboxylic acids. So, when a student puts a drop of reaction mixture of a saponification reaction first on a blue litmus paper and then on a red litmus paper, he will observe that there is no change in the blue litmus paper and the red litmus paper turns blue.
APPEARS IN
RELATED QUESTIONS
Draw the structures for the following compounds of Propanoic acid.
Draw the structure of butanoic acid.
Describe a test for carboxylic acid.
The organic acid present in vinegar is ______.
How is ethanoic acid obtained from ethanol? Write down the chemical equation of the reaction involved.
Vinegar is a solution of about:
(a) 5 to 8 per cent ethanoic acid in alcohol
(b) 5 to 8 per cent ethanoic acid in water
(c) 50 to 80 per cent ethanoic acid in water
(d) 50 to 80 per cent ethanoic acid in alcohol
Which of the following observations is true about dilute solution of acetic acid?
(A) It smells like vinegar and turns red litmus blue
(B) It smells like onion and turns blue litmus red
(C) It smells like orange and turns red litmus blue
(D) It smells like vinegar and turns blue litmus red
Write the molecular formula of the given compound.
Sodium ethanoate
Ester is a sweet-smelling compound.
How is ethanol to ethanoic acid an oxidation reaction different from the reaction in which ethanol burns in the presence of oxygen?
