Advertisements
Advertisements
प्रश्न
Why is pure acetic acid also known as glacial acetic acid?
उत्तर
Acetic acid that contains a very low amount of water (less than 1%) is called anhydrous (water-free) acetic acid or glacial acetic acid. The reason it's called glacial is because it solidifies into solid acetic acid crystals just cooler than room temperature at 16.7°C, which ice. Removing the water from acetic acid lowers its melting point by 0.2°C.
APPEARS IN
संबंधित प्रश्न
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
What do you observe when you drop a few drops of acetic acid to test tubes containing
(a) phenolphthalein
(b) distilled water
(c) universal indicator
(d) sodium hydrogen carbonate powder
Write the name and chemical formula of the simplest organic acid.
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
Give the structural formulae of acetic acid.
Write balanced euation for the following :
Ethane is burnt in air.
Choose the correct answer:
Select the acid which contains four hydrozen atoms in it.
Write a balanced chemical equation for the following:
Monochloroethane is hydrolysed with aqueous KOH.
Ester is a sweet-smelling compound.
Why is glacial acetic acid called so?
