Advertisements
Advertisements
Question
State any two uses of esters.
Advertisements
Solution
Uses of esters:
(1) Esters are used in making artificial perfumes because of their sweet fragrance.
(2) Esters are used as flavouring agents in ice-creams, sweets and cold drinks.
APPEARS IN
RELATED QUESTIONS
How esters are prepared ?
When you add a few drops of acetic acid to a test-tube containing sodium bicarbonate powder, which one of the following is your observation?
(A) No reaction takes place
(B) A colourless gas with pungent smell is released with brisk effervescence
(C) A brown coloured gas is released with brisk effervescence
(D) Formation of bubbles of a colourless and odourless gas
What is the common name of methanoic acid.
Consider the following organic compounds:
HCHO, C2H5OH, C2H6, CH3COOH, C2H5CI
Choose two compounds which can react in the presence of conc. H2SO4 to form an ester. Give the name and formula of the ester formed.
An organic compound A (molecular formula C2H4O2) reacts with Na metal to form a compound B and evolves a gas which burns with a pop sound. Compound A on treatment with an alcohol C in the presence of a little of concentrated sulphuric acid forms a sweet-smelling compound D (molecular formula C3H6O2). Compound D on treatment with NaOH solution gives back B and C. Identify A, B, C and
Write the names of three compounds which can be oxidised directly or in stages to produce acetic acid.
The next higher homologue of ethanoic acid is ______.
What do you observe when acetic acid is added to sodium bicarbonate?
A student is studying the properties of acetic acid in his school laboratory. List two physical and two chemical properties which he must observe and note in his record book.
How is ethyne prepared in the laboratory?
State how the following conversions can be carried out:
Ethyl alcohol to Ethane
Write a balanced chemical equation for the following:
Monochloroethane is hydrolysed with aqueous KOH.
CH3–CH2–CHO : propanal : : CH3–COOH : _______
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
A few drops of ethanoic acid were added to solid sodium carbonate. The observation made was that ______.
Write the chemical equation for the following:
Saponification Reaction
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
Name the oxidising agent used in the conversion of ethanol to ethanoic acid.
Give the balanced chemical equation of the reaction.
Oxidation of ethanol by acidified potassium dichromate.
