Ans. On cooling, pure Ethanoic acid is frozen to form ice like flakes. They look like glaciers, so it is called glacial acetic acid.
Ans: This help to decrease solubility of soap and help in precipitation of soap from aqueous solution. This preparation is known as salting out.
9. Q. Why is soap not used in acidic solution?
Ans: Pyrolysis : The decomposition of a compound on heating in absence of air is known as pyrolysis. Pyrolysis is used on a massive scale to turn coal into coke for metallurgy, and fractional distillation
Cracking: The breakdown of large organic compounds by use of a catalyst and low temperature to form fewer different compounds is called Cracking.
Ans: This is because alkane does not release a sufficient amount of energy to break the hydrogen bonds in water. Therefore, the alkane does not dissolve.