Advertisements
Advertisements
प्रश्न
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
Advertisements
उत्तर
When a few drops of acetic acid added to a test-tube containing sodium bicarbonate powder its leads to the formation of sodium acetate along with release of carbon dioxide gas, which is colourless and odourless gas. Both solid sodium bicarbonate and its aqueous solution will react with acetic acid.
Following is the chemical equation for the reaction:
CH3COOH + NaHCO3 → CH3COONa + CO2 + H2O
Hence, the correct answer is Formation of bubbles of a colourless and odourless gas
APPEARS IN
संबंधित प्रश्न
Ethanoic acid has a .................... odour.
(a) Rotten eggs
(b) Pungent
(c) Vinegar-like
(d) Mild
A student adds a spoon full of powdered sodium hydrogen carbonate to a flask containing ethanoic acid. List two main observations, he must note in his note book, about the reaction that takes place. Also write chemical equation foe the reaction.
Consider the following comments about saponification reactions:
I. Heat is evolved in these reactions.
II. For quick precipitation of soap, sodium chloride is added to the reaction mixtures.
III. Saponification reactions are a special kind of neutralisation reactions.
IV. Soaps are basic salts of long-chain fatty acids.
The correct comments are
(a) I, II and III
(b) II, III and IV
(c) I, II and IV
(d) Only I and IV
Give a reason for Conductivity of dilute hydrochloric acid is greater than that of acetic acid
Give the name and structural formula of one homologue of HCOOH.
How does ethanoic acid react with sodium hydrogen carbonate? Give equation of the reaction which takes place.
On adding NaHCO3 to acetic acid, a gas is evolved which turns lime water milky due to the formation of:
(1) Calcium bicarbonate
(2) Calcium hydroxide
(3) Calcium carbonate
(4) Calcium acetate
Draw the structural formula of a compound with two carbon atoms in the following case:
An alcohol containing two carbon atoms.
Choose the correct answer:
Select the acid which contains four hydrozen atoms in it.
Give the balanced chemical equation of the reaction.
Oxidation of ethanol by acidified potassium dichromate.
