Advertisements
Advertisements
Question
A student adds a few drops of ethanoic acid to test tubes X, Y and Z containing aqueous solutions of sodium chloride, sodium hydroxide and sodium carbonate, respectively. If he now brings a burning splinter near the mouth of the test tubes immediately after adding ethanoic acid in each one of them, in which of the test tube or test tubes the flame will be extinguished?
(A) X and Y
(B) Y and Z
(C) X and Z
(D) only Z
Advertisements
Solution
The chemical reactions in test tubes X, Y and Z can be written as:-
Test tube X:-
CH3COOH + NaCl →No reaction
Test tube Y:-
CH3COOH + NaOH →CH3COONa + H2O
Test tube Z:-
2 CH3COOH + Na2CO3 →2 CH3COONa + CO2 + H2O
Thus, the flame will be extinguished when test tube Z is brought near a burning splinter due to evolution of carbon dioxide gas, which does not support combustion.
Hence, the correct option is D.
APPEARS IN
RELATED QUESTIONS
While studying saponification reaction, a student measures the temperature of the reaction mixture and also finds its nature using blue/red litmus paper. On the basis of his observations the correct conclusion would be
(A) the reaction is exothermic and the reaction mixture is acidic.
(B) the reaction is endothermic and the reaction mixture is acidic.
(C) the reaction is endothermic and the reaction mixture is basic.
(D) the reaction is exothermic and the reaction mixture is basic.
Describe a test for carboxylic 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.
A neutral organic compound is warmed with some ethanoic acid and a little of conc. H2SO4. Vapours having sweet smell (fruity smell) are evolved. What type of functional group is present in this organic compound?
How is acetic acid prepared from acetylene?
Draw the structural formula of a compound with two carbon atoms in the following case:
An alcohol containing two carbon atoms.
Why is pure acetic acid also known as glacial acetic acid?
With a labelled diagram describe in brief an activity to show the formation of ester.
Give the balanced chemical equation of the following reaction:
Evolution of carbon dioxide by the action of ethanoic acid with NaHCO3.
In the presence of the acid catalyst, ethanoic acid reacts with ethanol and ______ ester is produced.
